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    Confidence interval for variance

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    Assume that the heights of women are normally distributed. A random sample of 20 women have a mean height of 62.5 inches and a standard deviation of 1.3 inches. Construct a 98% confidence interval for the population variance, (lower case sigma)2.
    a.(0.9,2.1)
    b.(0.9,4.4)
    c.(0.7,3.2)
    d.(0.9,4.2)

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    Solution Summary

    This solution gives the step by step method for computing confidence interval for variance are given.

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