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
58
FI0921
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