Question: A random sample from a normal population yields the following 25 values: (a) Calculate an unbiased estimate of the population mean. (b) Give approximate 99%

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

(a) Calculate an unbiased estimate of the population mean.
(b) Give approximate 99% confidence interval for the population mean.

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

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