How to find a missing value given the mean | Data and statistics | 6th grade | Khan Academy
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- Опубликовано: 11 сен 2024
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Learn how to find the value of a missing piece of data if you know the mean of the data set.
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Simpler method
Add the data or Ages: 5+2+2+4+8 = 21
Multiply the mean to the *AMOUNT* of the data or ages: 4 x 6 = 24
Subtract The SUM of the Ages to the PRODUCT of the mean and amount of ages: 24 - 21 = 3
The missing data or age is 3
What if the ammount of all the ages added up is more than the number of ages times the mean
Jlj Yeet THANK YOU!!!!
@@jillianglasser7405 That can never be the case - by definition of the mean, if you multiply the mean times the amount of data points (the different ages in this case) you will get EXACTLY the sum of the data points (sum of the ages in this case).
Both methods are applicable to solve these types of questions.
Jlj Yeet Life saver.
Thanks a crap ton
If you want a simpler way to solve or comprehend problems like this, I'll show you a trick that I developed randomly while I was solving my homework. I will use the same example used by Sal in this video.
First, do the mean times # of ages in this case. 4 times 6 = 24
Then, add all of the # of ages that you already have. 5+2+2+4+8=21
Finally, subtract your mean from the total # of ages you have. 24-21=3
Both methods that Sal and I used got the same result but in a similar yet different way.
thank you
Thank u so much this help so much what he was doing was so confusing 😃
why you did 4 times 6
Omg thank you
@@ishikagupta2137 the mean is four, and u have six kids
You can also-
1. Add all values from the data (table).
2. Multiply the mean/average by the number of how many values there are.
3. Subtract the product from the sum, or vise versa.
ok kool
Thx
Thank you 🙏
Aw thankyou, I was actually confused by the main video with everything going on. This is such a straightforward method. ❤
you are the best!!! I missed one class and I watched your video and got my homework done!! thank you!!!
Same
Thank you so much, I've been having some trouble when it comes to those questions because when I do my practice booklet, the answer page doesn't show the process of getting to the answer. This video helped me so much, thanks Khan.
how do we calculate the memes
Memes?
lol ;D
By watching pewdiepie
Yes
You calculate the "MEAN" by adding all the numbers you want to add and divide it by the amount of things you added
Ex:
Find mean of- 33,65,889,59,99
All of it added is-1145
Divide (1145/5)
Mean=229
Why would someone put a thumbs down? He is trying to teach you math.
its other RUclipsrs that are hating on him for he gets more views.
Thank you so much, this was extremely helpful :)
RockinTheMachine noice pro pic bro
Also can you put this as one of your practice questions in the app so we can practice doing it?
Thanks Sal!! worked out perfectly!!
Thank you so much you helped me understand this topic in my class better thanks for making this video it helped so much!!!
I love khan 🏫 academy ✍️📖
Thank you for the help!
Thank You Sal
This guy's math is another level simple problem solve with most complex way
Thank you all so much, the video and the help in the comments helped me finish a question that I was stuck on for a long time! 😅
OMG I didn’t get it at the start and now you have helped me complete my homework thanks
the case of the missing number is solved..
aGAIN kHAN ACADEMY GETS ME OUT OF ANOTHER GRADE 8 MATH CLASS jam... whoo hoo nice bit of internet searching on my part as well... yipeee, great way to end the year!!! thank you!!!! see you in september
I;m in 6th and I have to know this...
great video. I enjoyed it very much.
this seriously helped
First video of Khan Academy!!!
What if the mean is missing too?
thank you so much
There are 6 numbers and the mean is 4. Adding all the numbers there are shown is 21, and you would divide the number by how many numbers there are, that's 6, so after it would be 4x6 which is 24, so the missing number is 3.
what program do you use for your drawings?
Thanks my guy!
Oh M G this is the most complicated expectation ever
so it's like working backwards right?
+Frxo Basically something like that
Is like looking carefully
this was so helpful tysm
helped me a lot
Can you do a series on the ged test like you do the SAT test In your app?
I have question if you end up getting a decimal num her like 1.2 as your answer do you round or just leave it alone
thk you bro :) you explaination is so much clearer
Thank you
Khan, will you help me by making a video on finding 2 missing frequencies when 2 mean of distribution is given? Please...
thx helped
Best explanation!
this really helped me, thx
Very helpful 👍🏽
Thanks man, i appreciate it
Everyone here when tests are up
Thanks
Awesome, really made very easy, may i know what program younuse to teach? Since it looks very user friendly
Thank you. The indian overpowered teachers had a different syllabus so they couldnt help me. This was exactly what I was looking for!!
he is an indian overpowered teacher check the eco
What do you do when there is more than 1 missing number?
Let's say that we only have the numbers 5, 2, 2, 4 and the last 2 are missing. Add up the numbers you have
5+2+2+4+x+x which is 13.
Multiply the amount of numbers/variables (6) to the mean (4)
You get 24
24-13=11
The rest is a guessing game. If you have 2 missing numbers/variables (like this example), split 11 any way you feel like it would make sense. If you can't afford to guess then I don't know. I'm not a professional at math like Khan so I don't know any better way. In Khans video, the numbers are 8 and 3.
thanks king
Thanks, this helped so much. I was totally paying attention in class today XD.
Lol
Thanks for tha help
Perfect
Thx sal you really helped and don’t let the diss likes get to you
OMG TY SO MUCH
I'm 26 years old. I'm amazed this is for 6th graders :)
I'm having one issue, we are asked to find the missing numbers in a group data but the the total frequency number is not given, please I need help. Thank
for people who can hear the sound just turn the subtittles on
What if you only have one value and need to calculate more?
try doing long math
How do you find it when there’s two missing numbers and you’ve been give the mean and range
The issue I'm having is that the variables in the given list for my problem is long. I have 15 numbers to keep track of, so I'm going to try, but I'm still lost.
Edit: Also my missing variable is on the very end of the list, so this was very difficult.
mean * number of ages = total. without the missing value, find the mean. then, subtract the mean from the total
Well solved
Can someone help me with this equation pleasee (i tried everything but my result doesn't match with the book answers)
The mean of 8, x, 17, 2x+ 3 and 45 is 23. Find the value of x.
The answer is x=14
12
what is the missing term in the given series 5,7,28,45,____?
Pls sir i have doubt I have question
Mean of 6 member is 17. It was found out letter that 21 was
wrongly written as 12. Find the correct mean of the observation
But i didn't understand your video can you pls help me with this problem
agree
Add the date of ages 5+2+2+4+8=21
is there any shorter method?
HAHAHA
What if two values are missing?
why is there no sound
thank u very much I understand completely lol
The average of 12 numbers is 30 if the sum of first 3 numbers is 85 find the fourth number? How to solve this
He’s making this difficult, just times the average by how many numbers there are then whatever answer you get for example 30 I’d add all the numbers that you know already, for example 2 7 5 6 1 then take away the answer from 30
this helped but the method is way to long.
CAN SOMONE TELL ME HOW TO DO THAT BUT WITH TWO UNKNOWS PLEASE MY TEST IS TOMORROW
sense
3
W vid, W comments
Or you could just call the parents and ask. XD thanks, though, I have math test today, and didn't know how to do this TwT
What about two missing ages?
thats easy lol
Frxo then tell him how to 😛
I don't get it
me watching this in 11th having no clue i learned this 5 years ago
bro sounds like Frank Zappa
A=k*r^2
A=100
k=4
What is the value of (r)
Can anyone show the working out please thank u.
You should use Reddit or yahoo to help you, not RUclips
+Alaur Rahman I really don't understand anything in your comment
Who is watching this the night before an exam
m e m e
Thx
Well that was a very complicated way of doing it. My poor brain
So complicated
Not helpful at all
The number behind the blue stuff is NOT 3 the number should be 6 NOT 3
no lol
are u taking ap stats
Ha EASY
his voice kinda....
What about if you don't know the mean
Not so helpful, sir please amend it
I can't understand what you mean. Your sentences are mixed together.
Dumb
Keep writing all over the board to make it more confusing. If your kid is a point and shoot kind of kid and doesn't get it. Writing all over the place doesn't help
Lol
Noooo it is failure
Man math is such bs. Just call up the parent and ask how old the kid is.
this makes no sensr