Question

Find the mean and sample standard deviation
4, 9, 26, 34, 48, 68, 73, 94, 144, 157, 259, 265, 271, 271, 288, 398

Answer 1

okay so how do we find the average = mean

Answer 2

Hello?

Answer 3

add them all up first?

Answer 4

yep

Answer 5

and divide by what?

Answer 6

what do we need to divide by?

Answer 7

the amount of numbers

Answer 8

146.1875

Answer 9

let me check if that is correct

Answer 10

not quite

Answer 11

whatd i do wrong

Answer 12

did you add all of them up and divide by 16?

Answer 13

Once you find xbar I suggest you set up a table like this to organize your work to find the sample standard deviation.

Answer 14

@brittlynn

Try the online mean and sample standard deviation calculator.

https://www.easycalculation.com/statistics/standard-deviation.php