Question

calculate the standard deviation for the following data set: 16,35,25,29,26,30,42,18

Answer 1

find the mean (xbar)

subtract the mean from every score; x - xbar = a

square the differences; a^2

divide a^2 by (n-1) where n is the number of data points = b

sqrt(b) is teh standard deviation

Answer 2

16,18,25,26,(mean),29,30,35,42

mean = 27.5

Answer 3

A.7.9 B.8.5 C.26 D.28

Answer 4

16-27.5 = -11.5
18-27.5 = - 9.5
25-27.5 = - 2.5
26-27.5 = - 1.5
29-27.5 = 1.5
30-27.5 = 2.5
35-27.5 = 7.5
42-27.5 = 14.5
-----------------
1

Answer 5

forget the 1 lol

Answer 6

square then add...

Answer 7

:/

Answer 8

506 is the total of the squres

Answer 9

sqrt(506/7) = standard deviation...

....8.50

Answer 10

id go with B