ANSWER TO FRAME 40.
mean = u = ΣX = 100 = 10
N
10
(X-u) 2
X
X- u
6
-4
16
Note: We are inter-
6
-4
16
ested in a popula-
7
-3
9
tion of all ten
8
-2
4
people in an office.
9
-1
1
Thus we compute the
11
1
1
population mean and
13
3
9
standard deviation.
13
3
9
13
3
9
14
_4
16
ΣX = 100
Σ(X-u) = 0
Σ(x-U) = 90
2
standard deviation = σ =
Σ(X - u) 2
=
90
=
9
= 3
N
10
1
56
FI0921
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