Question: Hi im stuck with this problem and I need solution. thank you. random sample from a normal population yields the following 25 values: 90 87

Hi im stuck with this problem and I need solution. thank you.

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

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