I see that people are getting confused with this standard deviation because it doesn't have (n-1). There is a standard deviation for chemistry which is for control samples and there is a standard deviation for population which is shown in this video. For the chemistry standard deviation you follow all the same steps but INSTEAD of having (n) you use (n-1).
Thank you so much for sharing your knowledge. I am in a course for business statistics and I was struggling to understand standard deviation....until I watched your video and it all clicked. I hope you do not mind I shared your video with my classmates who might be struggling with mean median mode and standard deviation as well. I am amused now by your data sets of five numbers, one data set in my assignment this week had 57 numbers. Thanks again John Quinn! :)
The mean, median, and mode is pretty easy. However I just need to know the standard deviation. I'm sure I will understand standard deviation after this video. Thank you!😊
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 __________.
1.The denominator for SD will be (n-1) if the sample set is a part of huge parent set 2. The denominator for SD will be (n) if the sample set is parent set(Complete set)
Ashton Bauer 0,25 is a real number get the square root is 0,5. Also negative numbers and 0 are real numbers as well and they don't have real roots I think you meant natural numbers 1 2 3 4..
That makes no sense. Even if you did it individually, you still get the wrong answer. I got 1.14 if it was (N-1). So the bottom would be (5-1) or (4) Anyone else?
@@malithsamaradivakara Sorry for late response. I think you've got the answer by now but still. The std deviation of sample with N-1 is the unbiased estimator of the population std deviation. Meaning the expected value of that std deviation equals the pop std deviation.
i think somehow there was a mistake,because we were dealing with a sample data which used a sample mean not population mean. why ddnt we divide by N-1??
yeah ..there suppose to be 5.20/n-1 is 4 = 1.3 sample variance and 1.1401 is stand.dev. anyway thanks a lot for your time and video....i know you are expert of this.
Please can you write all the formulas of statistics with explanation. It would be a good idea and will be very easy understandable to me. I have my exams in Nov 10, so can I get it before 5 Nov? 🤔 🙏🙏
wish my teacher could be more fucking specific like this then telling me braindead teasers how to figure out ty for actually teaching it in 4 min then me learning about for 1hr and still not understanding the junk shes saying
you explained this more clear than my professor did in 3 hours.
Mohammad Muwali hahahahaha
Perhaps the professor was paid by the hour??? ...... This nice explanation is the future for education.
Bro some of Arab teacher love student need still with you more hours to get more mone
The best type of videos, short straight to the point.Thanks!
I see that people are getting confused with this standard deviation because it doesn't have (n-1). There is a standard deviation for chemistry which is for control samples and there is a standard deviation for population which is shown in this video. For the chemistry standard deviation you follow all the same steps but INSTEAD of having (n) you use (n-1).
Thanks John Quinn , This video helped me a lot. You are doing a great job man, keep it up. God will always bless you.
Thank you so much for sharing your knowledge. I am in a course for business statistics and I was struggling to understand standard deviation....until I watched your video and it all clicked. I hope you do not mind I shared your video with my classmates who might be struggling with mean median mode and standard deviation as well. I am amused now by your data sets of five numbers, one data set in my assignment this week had 57 numbers. Thanks again John Quinn! :)
Dude! Well done! Thanks! We owe you a beer!
brilliant , simple and straightforward , thanks for your help
Thank You, this video helped a lot!
Finally someone who explains better.
So much easier than literally every other person and site explaining statistics out there.
Very easy to follow thanks. Now please do that with a big set of 3 digits number. 🙏🏼
The mean, median, and mode is pretty easy. However I just need to know the standard deviation. I'm sure I will understand standard deviation after this video. Thank you!😊
Please the denominator is not N? but it is (N-1)
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 __________.
1.The denominator for SD will be (n-1) if the sample set is a part of huge parent set
2. The denominator for SD will be (n) if the sample set is parent set(Complete set)
The best help so far
Good work man... easy and simple explaination
John Quinn I'm getting 1.08 as standard deviation: on my calculator; how did you get 1.02 please explain
mathematically impossible. Any R (real number) > 1 cannot have a square root greater than itself.
Fred Phelps I got the same thing
Ashton Bauer 0,25 is a real number get the square root is 0,5. Also negative numbers and 0 are real numbers as well and they don't have real roots
I think you meant natural numbers 1 2 3 4..
Isn't it over (N - 1) NOT N?
David MacCumber it's n-1 if it's just a sample. In this case, it's a whole population.
That makes no sense. Even if you did it individually, you still get the wrong answer. I got 1.14 if it was (N-1). So the bottom would be (5-1) or (4) Anyone else?
@@malithsamaradivakara Sorry for late response. I think you've got the answer by now but still.
The std deviation of sample with N-1 is the unbiased estimator of the population std deviation. Meaning the expected value of that std deviation equals the pop std deviation.
Simple and good. Thank you for video
Awesome explanation! Thanks.
Very clrear and usefull. Tanks a lot 🙌
damn super well explained! TY so much
+brazy999 my teacher cant explain shit ....
You saved mankind.
love the pen...what pen it is?
₹5 wala black pen
+Shashank Sahare hahaha
Thanx man today my paper...
Thanks! You really helped me with the standard deviation
Fuck man, you saved my life. Thanks a lot!
there should be n-1 hence divided by 4
read the top most comment
i think somehow there was a mistake,because we were dealing with a sample data which used a sample mean not population mean. why ddnt we divide by N-1??
Thanks :) Explained in simple language
nice explanation. super helpful.
yeah ..there suppose to be 5.20/n-1 is 4 = 1.3 sample variance and 1.1401 is stand.dev. anyway thanks a lot for your time and video....i know you are expert of this.
Yeah this is wrong. The denominator is supposed to be n-1
THANK YOU!!!!!
explanation super sir
Lovely
whos hear after "Howcast" tried to explain it ? lol
Just watched their video
Me lmao
Read the most liked comment.
really praise worthy
Thanks, a million!
this helped me a lot!! thanks!!
Thanks
No stupid questions - right?
What does the standard deviation mean in this example?
Thanks to be very helpful
thanks so much sir u save my life
Thank you, so much!
thank you so much 😄😄 this helped me alot 😊
For the mode, What if no number shows up twice? Example 260,266,272,275 what is the mode there??
Soo good
Thank you so much !!!
this helped me so much!
Why no need to use n-1? It just n???? Need help...
why we choose for median 0 because first figure we see ,median is 0
i'm sure in the formula you have to use n-1 and not just 'n'. maybe it's different in America but for me in the UK that's wrong
Im american and my teacher taught n-1 also. I think he just got it wrong. What year of secondary School are you in?
Please can you write all the formulas of statistics with explanation. It would be a good idea and will be very easy understandable to me. I have my exams in Nov 10, so can I get it before 5 Nov? 🤔 🙏🙏
Tfw you didn't study for your finals so you watch RUclips videos before you go to school
thank you sooooo much sir
What happened to the negative signs please?
Omg.....THANK YOU!!!!
But how do you interpret the data? Calculations are easy but to interpret is where I really struggle.
Where can i find the 't' value for other sample sizes for example, 16.
But in stander deviation where's come from (1.04) anyone can Explain?
thank you so much :)
How about n-1? How to use that?
Where did you get the N from ??
how did you get 1.02?
isn't the square root of 1.04 is 1.08?
mathematically impossible. Any R (real number) > 1 cannot have a square root greater than itself.
unless you count 0 or negative numbers
you never explained how you got the numbers for the second column
wish my teacher could be more fucking specific like this then telling me braindead teasers how to figure out ty for actually teaching it in 4 min then me learning about for 1hr and still not understanding the junk shes saying
Owww.. I see what he did there at the end.
He rounded it. because I got=1.0198039 - Rounded=1.02
thanks Sir
who do you divide by 5 on the last big? where has 5 came from, is it not 5.2
+Lucy Clark There are 5 numbers.
+ultrapwnd thank you
thank u sir😀
where is that 1.02 coming frommmmmmmm!!! I'm totally confused
√1.04
Would be 1.019 "round to nearest tenth and that would be 1.02
please tell me answer
find mean median and mode
75%, 3.2, 450%, 0.25, 8upon5, 1.54
The way of your explaining is quite difficult. But thanks for the upload anyways 😊👌
Nice
Isn't it n-1 ?
Wouldn't they square root of 1.04 be 1.08
Square root is x times x = y in this case 1.0198039027 times 1.0198039027= 1.04
wrong. ayo is correct
it was helpful👊
the answer to S.D is 0.4225
What did u do in last that (x-x)2
thanks
Isnt it N-1
Damn PLTW
nice
Why that
help ful hint
find mean median and mode
75%, 3.2, 450%, 0.25, 8upon 5 and 1.54
At 3:36 why do you divide by 5?
theechifam YT because he has 5 numbers to start with
Wait I got 1.08 16, I’m so confused 😣😣 like I get every other part but the last part lol about 1.02
Xcelant
WOW
Please I'm getting 1.04 as my answer
it's n-1
寫快d啦你! 阻住哂!
easy formula of s.d
easy than my teacher
super easy
n-1 not n
It depends on whether you have a sample (n - 1) or a population (n).
that's wrong