A survey of 100 businesses revealed that the mean after-tax profit was $80,000.Assume the population standard deviation is $15,000:
a.Determine the 95% confidence interval estimate of the mean after-tax profit for all businesses.
b.Explain why you can use the confidence interval formula here,even though the population is not necessarily normal.

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The Answer of A survey of 100 businesses revealed that the mean after-tax profit was $80,000.Assume the population standard deviation is $15,000:
a.Determine the 95% confidence interval estimate of the mean after-tax profit for all businesses.
b.Explain why you can use the confidence interval formula here,even though the population is not necessarily normal.

A Survey of 100 Businesses Revealed That the Mean After-Tax