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

Question

amistre64 · Answer

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

amistre64 · Answer

16,18,25,26,(mean),29,30,35,42

mean = 27.5

anonymous · Answer

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

amistre64 · Answer

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
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amistre64 · Answer

forget the 1 lol

amistre64 · Answer

square then add...

anonymous · Answer

:/

amistre64 · Answer

506  is the total of the squres

amistre64 · Answer

sqrt(506/7) = standard deviation...

....8.50

amistre64 · Answer

id go with B