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Statistics - Confidence Interval

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The following random sample from a population whose values were normally distributed was collected.

10 8 11 11

The 95% confidence interval for m is
a) 8.52 to 10.98
b) 7.75 to 11.75
c) 9.75 to 10.75
d) 8.00 to 10.00

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Solution Summary

The expert calculates the confidence interval in statistics. A complete, neat and step-by-step solution is provided.

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m = (10 + 8 + 11 + 11)/4 = 10

Deviations from m are d = {0, -2, 1, 1} and d^2 = {0, 4, 1, 1}

Sum(d^2) = ...

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