"What is standard deviation" "It's the square root of the variance" Good God, I cannot express how useless that answer has been for me, lol. Thank you for explaining what it actually **is**, OP.
After searching google for a half hour and dealing with people who couldn’t explain anything to someone who doesn’t know math, this video gave me the straightforward answer I needed. Thank you for actually providing information rather than trying to seem smart by making the explanation more complex than necessary.
And I'm just as confused as I was before watching this video. You keep using "standard deviation" to explain "standard deviation". But you never really explained WHAT a standard deviation IS. You might as well be explaining that the word "inch" is used to express how many "inches" something is without ever saying WHAT an inch IS. Yes, you said that it is used to determine how far from the mean a given example is. I get your point about how SD is used. But WHAT IS a standard deviation? How is "standard deviation" determined? What makes "1 standard deviation"?
@0:38 here's where my problem lies. You tell what the standard deviation of this particular data set is ($28.01). But you didn't explain how that is determined. So it's just an arbitrary number you pulled out of the air as far as I can tell (given the lack of information). And that's why - even after watching a video entitled "Standard Deviation - Explained and Visualized" - I still have absolutely no clue WHAT an SD IS.
Wood 'n' Stuff The squeaky wheel gets the oil; thank you for being squeaky on behalf of the rest of us dummies who were too shy or too kind to challenge the video :)
That is a mark of a greater teacher... able to explain the concept in plain and simple terms for the audience to understand. Commendable effort for both narration and the animation. Thank you
For anyone doing the maths as they follow the video, I think the standard deviation of 28.01 was calculated using sample standard deviation, not population standard deviation.
Thank you so much for this video. I literally spent a week trying to read and google things but I could not wrap my head around this concept. This helped me sooooo much!
Really? "Cause I still have no clue what a standard deviation IS, only that it's used to express how far a given sample deviates from the mean. But what determines HOW FAR from the mean equates to "a standard deviation" or "2 standard deviations", etc...? How is a unit of "standard deviation" defined?
Standard deviation is more like "average distance of the points from the mean". A standard deviation is something you calculate first using the data set in hand, and then go on and see distance from the mean for each point. You can imagine, mean to be the centre of a circle and the standard deviation to be a radius.... this is the average distance of the points from the mean. For a normal distribution, meaning the values are more evenly distributed, 68% of the points fall within that radius. 95% of all the points fall within 2 x radius. 99.7% of the points fall within 3 x radius. You can call the standard deviation as the average deviation (from the mean), if you like. (I think the term average deviation may not be used because the formula for standard deviation uses squares and then square root, which doesn't sound like a real average). See other video from "MrNystrom" regarding standard deviation... that should really help.
I watched this video and it explained it so well I’ve had it on repeat on my laptop overnight so when the ads play it watches them all and you get paid more :)
You are GREAT! Sometimes we need the information with visual without the math until you understand what it is that is being explained by what standard deviation is.
I agree. I watched it a few times and I am still trying to understand how we got $28.01. Maybe an actual onscreen written out example would hope. I know it would help me.
Thanks for the great PowToon! Really great production quality. I'm not an expert on SD, thus I consulted your video. I love seeing experts in their filed find ways to communicate difficult concepts in concise and meaningful ways! Well done! (And adding a transcript - A+)
You're great. Some students need to see the whole before picking up on the parts. Meaning, computation is great but if students can't understand what is being observed, computation means nothing.
You have explained it in a very simple way which i was not expecting to be available at youtube... Thank you so much and keep making videos like this... It would be appritiable
00:36 The value 28.01 is for a sample, not a population. There are only 5 data points in total, it is not a sample. Therefore the standard deviation is 25.05, not 28.01.
It's not just you, he just highlighted what S.D is. E.g it's like we know the quartiles Q1 and Q3 are basically the medians or the lower values and upper values but that still doesn't tell us how to find Q1 and Q3, that's exactly what this dude did.
Dear Internet users, I would like to inform you that I have just put up for sale my first training course, "Statistics for functional data with R software" on my site in ebook format. Here is the link for more info: amikour.wordpress.com/nos-formations/ Thank you very much if you spread the word to your contacts or if you post the info on your Facebook, Twiter, ... pages.
In school teachers will teach you formula to find things and occasionally draw diagrams Fast Forward: College profs will say you learnt all this things in school in your 8th grade. The main process of understanding remains void.🤥😣
Great explanation and just shows how bad our educational system truly is. How come someone on the internet can explain this much better than a university professor ?
Not sure if I can answer your question fully, but I do have a little insight based on my personal and professional experience. I'll stick to the professional, though. A number of factors can make the traditional model of teaching (usually lecture-based) inefficient. Until we start to examine other means of curriculum presentation, we're really not doing anyone any favors, and I'd agree - the educational system is not working near its intended optimal standard. I can very much identify with this sentiment working in higher education over the last half decade, but Education as a whole is on a precipice, meaning we could strain in one direction or another. I think there are some brilliant minds and definitely some gifted people out there who can explain and are using available technologies to do so in a way we have not really seen before. I am hoping to see more videos like these, and I am hoping that more educators and others (instructional designers, educational technologists, all involved in this field) will embrace facilitator roles to better engage with content and media so as to best engage (and engage with) students to inspire an attitude of life-long learning in some areas. :) Long rant, I know, but your comment really struck me as being right on and the cry of the masses; I just hope I was able to offer a glimmer of hope!
@ 40 seconds in to it how did you get to the standard deviation of 28.01? Are you teaching this or are you talking to people who already knows this? Sorry but the jumps ahead do not help. I hope you take this input the right way. Thanks.
1:42, some elaboration on what he means by "statistically significant" or "expected variation". We consider some event which is under control can happen if its probability lies within 2 standard deviations on each side i.e., 95% probability in total. However if the event happens and it lies beyond 2 standard deviations i.e., 5% probability in total, we consider this event has happened purely due to chance and it is beyond control. Here in this example if what we are aiming for is,say, the quantity being filled in the bottle is 100ml and we get 95 ml once(which the customer does'nt mind) which falls inside 2 s.d , it is "expected variation". However, if we get a 90ml(which the customer does mind), and we find it lies within our 2 s.d too, the we consider the result statistically significant and try to control it since it not happening purely due to chance. I am assuming that our null hypothesis is "the event will not take place". Correct me if i am wrong : D
I am still thoroughly confused as to how you obtained the SD of $28.01 for the values you used (21,50,62,85,90). I used several online standard deviation calculators and the answer given was $25.05, which is what I calculated. It would be extremely helpful if you would walk us through that rather than using a different value set as an example.
Hi there sorry for the confusion. There are two slightly different ways to calculate standard deviation based on whether you have all the data in the population (SD = $25.05) or are working with a sample of the data (SD = $28.01). I have another video with steps to calculate: ruclips.net/video/WVx3MYd-Q9w/видео.html
In layman terms, mean is the average for the set of data (of one value to another) or it's also known as the expected value. Meanwhile variance is the average for the difference between the mean and each value from the set of data. And the square root of variance is known as standard deviation.
Standard deviation = Start with finding sample variance... 1. Sample Variance Take all data points and subtract the mean from each one, square it, and add the sum up ---> (21-61.6)^2 + (50-61.6)^2 + (62-61.6)^2+ (85-61.6)^2 + (90-61.6)^2 = 3137.2 Divide the sum by the amount of data points (5) and subtract 1 ---> 3137.2/ (5-1) = 784.3 2. Standard deviation is the square root of the sample variance ... ---> root 784.3 = 28.005 ~28.01 hope that made sense :)
The sample standard deviation of the dataset 2, a, 12, 18, and 30 is 10.8 (correct upto one decimal place), where a is an unknown quantity. Then, the value of the sample variance of the new dataset that is obtained by adding 5 to each number of the given dataset is __________
If you're complaining about the quality of this video in any fashion, then you desperately need a cold cocktail on a mild and sunny day on a tropical beach likely no more than 1.5x standard deviations from where you are right now as you read this silly comment. If you're not complaining about this video, I wish you the same. This video's producer made RUclips just a little bit better by adding it.
Hello I’m watching this video a few years after it’s been posted. I have an observation regarding the units you provided for the example: $21, $50, $62, $85, and $90. When I went through the calculation the standard deviation comes out to 25.04. How did you reach 28.01?
Explained better than the crap I paid for in college
Lol, Same goes here.
College sucks dick lol stealing my money
Reason why I don't plan on going
@@deersteve191 Just an excuse because school is not for you. Hope you won the genetic lottery, otherwise, have fun doing menial jobs.
I thought the same thing lol. Those professors know their stats but terrible at translating it to students.
he sounded so bored out and exhausted during the video up untill "THANK YOU FOR WATCHING!"
Yeah
😂
He ruined it
😂😂😂😂😂
Maybe he made the video as an assignment for his class?? No connection otherwise.
"What is standard deviation"
"It's the square root of the variance"
Good God, I cannot express how useless that answer has been for me, lol. Thank you for explaining what it actually **is**, OP.
This ^^^
I guess people who are giving their expert answer on this statistics question are not experts on english lol
After searching google for a half hour and dealing with people who couldn’t explain anything to someone who doesn’t know math, this video gave me the straightforward answer I needed.
Thank you for actually providing information rather than trying to seem smart by making the explanation more complex than necessary.
And I'm just as confused as I was before watching this video. You keep using "standard deviation" to explain "standard deviation". But you never really explained WHAT a standard deviation IS. You might as well be explaining that the word "inch" is used to express how many "inches" something is without ever saying WHAT an inch IS.
Yes, you said that it is used to determine how far from the mean a given example is. I get your point about how SD is used. But WHAT IS a standard deviation? How is "standard deviation" determined? What makes "1 standard deviation"?
@0:38 here's where my problem lies. You tell what the standard deviation of this particular data set is ($28.01). But you didn't explain how that is determined. So it's just an arbitrary number you pulled out of the air as far as I can tell (given the lack of information). And that's why - even after watching a video entitled "Standard Deviation - Explained and Visualized" - I still have absolutely no clue WHAT an SD IS.
This video's more focused on the concept. This one explains how it's calculated: ruclips.net/video/WVx3MYd-Q9w/видео.html
Jeremy Jones - I appreciate that! I actually find and watched that video after this one. It cleared things up quite nicely. Thank you very much.
Steve , it's the Distance Between Two Standard Points
Wood 'n' Stuff The squeaky wheel gets the oil; thank you for being squeaky on behalf of the rest of us dummies who were too shy or too kind to challenge the video :)
That is a mark of a greater teacher... able to explain the concept in plain and simple terms for the audience to understand. Commendable effort for both narration and the animation. Thank you
...just to think after ALL my years of college something so simple was finally made simple.
THANKS
wolfgangk1 Really…? And I’m here at 11pm trying to figure this out for a high school assignment
@@gustavourbina8343same
WHY IS THIS VIDEO SO GOOD???
I was a bit of a math nerd in HS but never understood what this was until today when I saw this freaking video wow
For anyone doing the maths as they follow the video, I think the standard deviation of 28.01 was calculated using sample standard deviation, not population standard deviation.
Showed this to my class, the class average after was 47%. Bad video? Bad class? Healthy mix. Thank you so much!
Thank you so much for this video. I literally spent a week trying to read and google things but I could not wrap my head around this concept. This helped me sooooo much!
i have seen a lot of videos lately to understand the concept but you really are the only one who make me understand. thanks
NO ONE HAS EXPLAINED THIS BETTER
THANK YOU MUCH!!
I'm in mid-career engineer and I haven't seen such an articulate explanation like this before.
Really? "Cause I still have no clue what a standard deviation IS, only that it's used to express how far a given sample deviates from the mean. But what determines HOW FAR from the mean equates to "a standard deviation" or "2 standard deviations", etc...? How is a unit of "standard deviation" defined?
Standard deviation is more like "average distance of the points from the mean". A standard deviation is something you calculate first using the data set in hand, and then go on and see distance from the mean for each point.
You can imagine, mean to be the centre of a circle and the standard deviation to be a radius.... this is the average distance of the points from the mean. For a normal distribution, meaning the values are more evenly distributed, 68% of the points fall within that radius. 95% of all the points fall within 2 x radius. 99.7% of the points fall within 3 x radius.
You can call the standard deviation as the average deviation (from the mean), if you like. (I think the term average deviation may not be used because the formula for standard deviation uses squares and then square root, which doesn't sound like a real average).
See other video from "MrNystrom" regarding standard deviation... that should really help.
I still have no clue. Did the guy pay you to say that?
luxe1414 bulshit I could barely start to understand one thing before you start talking about something else and had me completely fucked up confused
I love your explanation, delivery style and your voice. Currently learning complicated spreadsheets in Excel 2016 brought me here! Again, tyvm!
Really simple, concise and the analogies used in place of a definition makes it even easier to grasp. Apreciate it
I watched this video and it explained it so well I’ve had it on repeat on my laptop overnight so when the ads play it watches them all and you get paid more :)
Love what you did here sir
❤❤❤
You are GREAT! Sometimes we need the information with visual without the math until you understand what it is that is being explained by what standard deviation is.
thank you for explaining this. you made it simple and to the point with no extra fluff to confuse those who are learning. great job.
Thank you for the transcript, Jeremy, and for taking your time to present this information. Very much appreciated!
with this video, the memories of my college stats subjects which i've taken around 2 decades ago suddenly got refreshed. Thank you
Oh my god this was so perfectly explained, so concise, wow what a perfect video
0:37 Might be helpful if instead of just saying what the standard deviation is, you explain how you came to it being the amount $28.01 in this example
exactly
Maybe watch the video first? He literally explains
@@KP-hw5og Maybe unclear from title, lack of referral to other video, lack of mention of series or being in a playlist. Literally? Ok
I agree. I watched it a few times and I am still trying to understand how we got $28.01. Maybe an actual onscreen written out example would hope. I know it would help me.
Best explanation of standard deviation I've come across yet, thanks for this!
Thanks for the great PowToon! Really great production quality. I'm not an expert on SD, thus I consulted your video. I love seeing experts in their filed find ways to communicate difficult concepts in concise and meaningful ways! Well done! (And adding a transcript - A+)
this is probably the best 3 minute concept visualization i have seen in my life. Holy shit. Thanks a lot bro!
THANK YOU!!!!!!!!!!! I suck at statistics, and it makes journal reading a nightmare. This
You're great. Some students need to see the whole before picking up on the parts. Meaning, computation is great but if students can't understand what is being observed, computation means nothing.
You have explained it in a very simple way which i was not expecting to be available at youtube... Thank you so much and keep making videos like this... It would be appritiable
This man is a legend!
It's 11:35 pm and I've got a math test tomorrow but I couldn't find a proper video on the topic, until now.
THANKS JEREMY
3 years later... how was it?
Seriously incredible teaching style you have here. Thank you so much for this information.
00:36 The value 28.01 is for a sample, not a population. There are only 5 data points in total, it is not a sample. Therefore the standard deviation is 25.05, not 28.01.
Right, he mistakenly divided it by n-1 and not by n
Wish I had seen this comment before I spent an hour trying to understand what I had done wrong 😩🙈
@Gordon Gao You're welcome.
Well explained using a clean and simple presentation and in layman's terms. Well done sir!
Best explanation of Standard Deviation, I have ever come across
Fantastic! Clearly explained, graphics are germane and interesting. Concise. Thanks!
leave the germans out of this
This video is in found within the 5th standard deviation of good videos.
8 weeks in tom 3020, stats for business, and this 3:42 vid explained the concept so much more clear and concise
That's the best explanation I've seen so far. Thank you, you saved me
you made it way easier to understand !! Impressive work Sir.
Thank you so much for this video. I know understand what standard deviation is after so many years of not getting it.
Maybe it just me but I'm still confused!
It's not just you, he just highlighted what S.D is.
E.g
it's like we know the quartiles Q1 and Q3 are basically the medians or the lower values and upper values but that still doesn't tell us how to find Q1 and Q3, that's exactly what this dude did.
Great explanation, the visuals were clutch!
This is the one!! Omg I hate this stuff, but this was so easy to understand. Thank you!
best explanation of Standard Deviation,
now i know why and how to use it.
thanks
খুব ভালো করে বুঝানো হয়েছে। স্কুল কলেজে এভাবে বুঝালে অনেক আগেই আমরা আরো আগাইতে পারতাম। অনেক ধন্যবাদ । বাংলাদেশ থেকে
ok, but this was the explanation I was looking for 😭Thank you so much!
what the SIGMA?
It stands for Standard deviation
😂😂😂@@MADO-LY
ur the only real one who gets it. what the actual SIGMA
Sigma means sum
Unlike equations, this is way easy to understand what is standard deviation
such an easy and amazing way to explain Standard Deviation, thank you
This completely took everything I read and simplified it.
Thanks
Been really struggling with this at university, thank you!
ah yes, u sound like casually explained. absolute banger
He said "This reasoning suggests that Lebron James is 1 in 2500 and Yao Ming is 1 in 450 million"
how did he find that out, please explain.
crisp and clear. just what I wanted
Helped me out here with my Data Analysis work! Thank you!
Brilliant explanation! Had no clue of what standard deviation mean't until this video! Thank you! :D
Dear Internet users,
I would like to inform you that I have just put up for sale my first training course,
"Statistics for functional data with R software" on my site in ebook format.
Here is the link for more info: amikour.wordpress.com/nos-formations/
Thank you very much if you spread the word to your contacts or if you post the info on your Facebook, Twiter, ... pages.
The standard deviation for the set of numbers presented at 0:39 is $25.05 not $28.01. Besides that, a very good explanation!
This difference comes from different formulas of variance: some divide by N others by N-1.
In school teachers will teach you formula to find things and occasionally draw diagrams
Fast Forward: College profs will say you learnt all this things in school in your 8th grade.
The main process of understanding remains void.🤥😣
May be a good idea to have a video that explains Mean, Median and Mode before jumping into Standard Deviation. Great work. Thank you.
wow, explained so simply, absorbed it all
Great explanation and just shows how bad our educational system truly is. How come someone on the internet can explain this much better than a university professor ?
Not sure if I can answer your question fully, but I do have a little insight based on my personal and professional experience. I'll stick to the professional, though. A number of factors can make the traditional model of teaching (usually lecture-based) inefficient. Until we start to examine other means of curriculum presentation, we're really not doing anyone any favors, and I'd agree - the educational system is not working near its intended optimal standard.
I can very much identify with this sentiment working in higher education over the last half decade, but Education as a whole is on a precipice, meaning we could strain in one direction or another. I think there are some brilliant minds and definitely some gifted people out there who can explain and are using available technologies to do so in a way we have not really seen before. I am hoping to see more videos like these, and I am hoping that more educators and others (instructional designers, educational technologists, all involved in this field) will embrace facilitator roles to better engage with content and media so as to best engage (and engage with) students to inspire an attitude of life-long learning in some areas. :) Long rant, I know, but your comment really struck me as being right on and the cry of the masses; I just hope I was able to offer a glimmer of hope!
@ 40 seconds in to it how did you get to the standard deviation of 28.01? Are you teaching this or are you talking to people who already knows this? Sorry but the jumps ahead do not help. I hope you take this input the right way. Thanks.
I learned more in a 4 minute video than my entire school experience.
1:42, some elaboration on what he means by "statistically significant" or "expected variation". We consider some event which is under control can happen if its probability lies within 2 standard deviations on each side i.e., 95% probability in total. However if the event happens and it lies beyond 2 standard deviations i.e., 5% probability in total, we consider this event has happened purely due to chance and it is beyond control. Here in this example if what we are aiming for is,say, the quantity being filled in the bottle is 100ml and we get 95 ml once(which the customer does'nt mind) which falls inside 2 s.d , it is "expected variation". However, if we get a 90ml(which the customer does mind), and we find it lies within our 2 s.d too, the we consider the result statistically significant and try to control it since it not happening purely due to chance.
I am assuming that our null hypothesis is "the event will not take place".
Correct me if i am wrong : D
Good pedagogy: You start off by explaining WHAT it means! Most videos are people just working out random problems on a white board.
2:22 "5'10 with a standard deviation of 3 inches" How did you calculate the 3 inches part? How do you know that number? I just want to understand :)
FINALLY. Simply, an explanation.
Very good and helpful presentation. Animation is on point.
excellent explanation for a student !!! thank you so much
Thank you so much for making this video!! It helped so much
I am still thoroughly confused as to how you obtained the SD of $28.01 for the values you used (21,50,62,85,90). I used several online standard deviation calculators and the answer given was $25.05, which is what I calculated. It would be extremely helpful if you would walk us through that rather than using a different value set as an example.
Hi there sorry for the confusion. There are two slightly different ways to calculate standard deviation based on whether you have all the data in the population (SD = $25.05) or are working with a sample of the data (SD = $28.01). I have another video with steps to calculate: ruclips.net/video/WVx3MYd-Q9w/видео.html
WOWWWWW..... Thank You... I always knew what it is, never saw it, and i really really wanted to see it. Now I can...
Wonderfully put. I was looking for something similar.
Lucid Explanation. Loved it!!!
In layman terms, mean is the average for the set of data (of one value to another) or it's also known as the expected value. Meanwhile variance is the average for the difference between the mean and each value from the set of data. And the square root of variance is known as standard deviation.
Thanks a ton, was confused so much on this but your video cleared everything up :)
This was incredibly helpful, thanks!
Thank you for making it simple! And fun to watch!
Well explained, chatgpt suggested your video
Thanks you just explained 4 weeks of work in 5 minutes.. now I finish this stupid project
That's a really good explanation of this. Thanks.
best explain for std visualize, thank you so much bro
Thanks, very informative!!! Super easier to understand the explanation.
How did you arrive at a standard deviation of $28.01 after getting a mean of $61.60?
Standard deviation =
Start with finding sample variance...
1. Sample Variance
Take all data points and subtract the mean from each one, square it, and add the sum up
---> (21-61.6)^2 + (50-61.6)^2 + (62-61.6)^2+ (85-61.6)^2 + (90-61.6)^2 = 3137.2
Divide the sum by the amount of data points (5) and subtract 1
---> 3137.2/ (5-1) = 784.3
2. Standard deviation is the square root of the sample variance ...
---> root 784.3 = 28.005
~28.01
hope that made sense :)
that's what I'm wondering ...
@Alexis Anderso
But why we subtract 1 from 5?
Hasan Darwish that is just how the equation goes, subtract 1 from the total # of data points. Not sure of the actual logical reason behind it
@@AlexisAndersonAA basically we do 1/(N-1) when we calculate std of sample of data and for whole population it would be simply 1/N.
Brilliant example and explanation. Thanks
The sample standard deviation of the dataset 2,
a, 12, 18, and 30 is 10.8 (correct upto one decimal place), where a is an unknown quantity. Then, the value of the sample variance of the new dataset that is obtained by adding 5 to each number of the given dataset is __________
I hated statistics class. Turned out to be the most useful thing i learned in college
So helpful! Thank you for taking the time to make this video. The visualisation really helped me to understand the simplicity of how this works.
I thought Mr. Plinkett, Mike and Jay were about to show up when I started this. I clapped, I clapped when I heard it! Things I knoooowww
IT BROKE NEW GROUND
How to calculate that Lebron is 1 in 2500 ? Thanks.
Amazing explanation even I am not a lover of stats but still it is touched my heart ♥.
great video, saved me from the scary dave. thankyou so much.
never heard a better explanation
If you're complaining about the quality of this video in any fashion, then you desperately need a cold cocktail on a mild and sunny day on a tropical beach likely no more than 1.5x standard deviations from where you are right now as you read this silly comment. If you're not complaining about this video, I wish you the same. This video's producer made RUclips just a little bit better by adding it.
Drew Arnold Hahaha amazing! Thanks for this! Glad you liked the video.
please help understand how you found the value for lebron being 1 in 2500 and Yao ming 1 in 450 mil!
Easy to understand explanation! Thanks
You could've explained how to calculate the standard deviation at the beggining of the video
this video is to explained WHAT is standard deviation, not to calculate them
Hello this is Chef John from FoodWishes withhhhh..... Standard Deviation!
Thanks Jeremy Jones. Explained amazingly!
Awesome video! You explained the concept well.
Hello can you please elaborate the relation of the $28.91 std deviation to the set of data.
this
Hello I’m watching this video a few years after it’s been posted. I have an observation regarding the units you provided for the example: $21, $50, $62, $85, and $90. When I went through the calculation the standard deviation comes out to 25.04. How did you reach 28.01?
Yea, man, same thing. He probably made a mistake
really well explained! much appreciated!