Question: A random sample from a normal population yields the following 25 values: (a) Calculate an unbiased estimate 2 of the population variance. (b) Give approximate

A random sample from a normal population yields the following 25 values:

(a) Calculate an unbiased estimate Ïƒ2 of the population variance.
(b) Give approximate 99% confidence interval for the population variance.
(c) Interpret your results and state any assumptions you made in order to solve the problem.

90 87 121 96 106 107 89 107 83 92 117 93 98 120 97 109 78 87 99 79 104 85 9 07 89

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