Construct a 95 confidence interval for the population mean, Ask an Expert

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a) construct a 95% confidence interval for the population mean, μ. assume the population has a normal distribution. In a random sample of 26 computers, the mean repair cost was $137 with a standars deviation of $35.

b) suppose you did some research on repair costs for computers and found that the standard deviation is σ=35. Use the normal distribution to construct a 95% confindece interval for the population mean, μ. compare the results.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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