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Mathematics
Problem
For a data set of 8 observations the arithmetic mean is 5 and the variance is 9. What is the value of
∑
x
i
2
\sum x_{i}^{2}
∑
x
i
2
? a)
238
238
238
b)
247
247
247
c)
272
272
272
d)
263
263
263
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