Population amount of paint per can

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Reference no: EM1395063

The manager of a paint supply store wants to estimate the actual amount of paint contained in 1- gallon cans purchased from a nationally known manufacturer. The manufacturer's specifications state that the standard deviation of the amount of paint is equal to 0.02 gallon. A random sample of 50 cans is selected, and the sample mean amount of paint per 1-gallon can is 0.995 gallon.

a) Construct a 99% confidence interval estimate for the population mean amount of paint included in a 1-gallon can.

b) On the basis of these results, do you think that the manager has a right to complain to the manufacturer? Why?

c) Must you assume that the population amount of paint per can is normally distributed here? Explain

d) Construct a 95% confidence interval estimate. How does this change your answer to (b)?

Reference no: EM1395063

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