If for a given data, $\sum (x-5) = 10$ and $n=20$, then... – Statistics

Statisticshard · Past Paper

If for a given data, $\sum (x-5) = 10$ and $n=20$, then the mean is:

B5.5

C4.5

D10

✓ Correct Answer: B — 5.5

$\sum x - \sum 5 = 10 \Rightarrow \sum x - 100 = 10 \Rightarrow \sum x = 110. Mean = 110/20 = 5.5$.

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