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Mathematics
Problem
The five observations of a data set satisfy
∑
i
=
1
5
x
i
=
60
\sum_{i=1}^{5} x_i = 60
∑
i
=
1
5
x
i
=
60
and
∑
i
=
1
5
x
i
2
=
860
\sum_{i=1}^{5} x_i^{2} = 860
∑
i
=
1
5
x
i
2
=
860
. Find the population variance of the data.
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