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Suppose that the number of students passed a Statistics class are normally distributed. A simple random sample of size 55 students has the standard deviation

Suppose that the number of students passed a Statistics class are normally distributed. A simple random sample of size 55 students has the standard deviation of 4 students was selected. Construct a 95% Confidence Interval estimate for the population VARIANCE of the numbers of students passed in all such Statistics classes.

A.(3.22, 4.62)

B.(3.48, 5.17)

C.(10.37, 21.34)

D.(12.10, 26.70)

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