ANSWER TO FRAME 41.

mean = X = ΣX = 140 = 28

n

5

(X - X) 2

_X_

X- X

25

-3

9

Note that since we have a

30

2

4

sample of 5 taken from the

29

1

1

total population of 100 we

23

-5

25

must compute a sample mean

33

_5

25

and sample standard devia-

115

0

64

tion.

Σ(X - X)2

standard deviation = s =

=

_64_

=

16

=

4

N-1

5-1

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