Question

Can anyone help me with mean, variance, and standard deviation?

Answer 1

@King.Void. @TheSmartOne @Compassionate can anyone help?

Answer 2

I really suck at Math..If you cant a "F" then we will talk about this :'D

Answer 3

oh..... okay. do you know someone who can help @King.Void. ?

Answer 4

@satellite73

Answer 5

@iGreen

Answer 6

@phi

Answer 7

Can you help?

Answer 8

what is the question?

Answer 9

to find the mean, variance and standard deviation and to round to the nearest tenth.

Answer 10

Did you find the numbers in your "chart" or were they given ?

Answer 11

they were given.

Answer 12

and sorry it looks so bad xp

Answer 13

do you know that the "mean" is another name for "average"
can you find the average x value (the first column) ?

Answer 14

47.6 ... I didn't know which column to find the mean of, I know what it is.

Answer 15

now the variance.
we use the definition
first find (x- mean)
square each of these numbers
find the average
It looks like they did that work for you (though the numbers look like they have been rounded, and I would not have rounded)

the only step left for finding the variance is finding the average of the (x- mean)^2 numbers

Answer 16

31.08?...

Answer 17

yes, that is what I got. rounded to the nearest tenth, 31.1

Answer 18

yeah. now how do I find the standard deviation?

Answer 19

square root of variance is std
sqrt(31.08)

Answer 20

ohhhh okay 5.57 so 5.6

Answer 21

can you help me with another one?

Answer 22

ok