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

90 87 121 96 106 107 89 107 83 92

117	93	98	120	97 109 78	87 99 79
104	85	91	107	89

(a) Calculate an unbiased estimate σˆ 2 of the population variance.

(b) Give approximate 99% con?dence interval for the population variance.

(c) Interpret your results and state any assumptions you made in order to solve the problem.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91640199

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