A random sample of 100 credit sales in a department store, Microeconomics

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A random sample of 100 credit sales in a department store

A random sample of 100 credit sales in a department store showed an average sale of $120.00.From past data, it is known that the standard deviation of the population is $40.00.

Determine the standard error of the mean.

With a .95 probability, determine the sampling error?

What is the 95% confidence interval estimate of the population mean?

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Microeconomics: A random sample of 100 credit sales in a department store

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Microeconomics: A random sample of 100 credit sales in a department store

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