# Question

The following quotes for cleaning cost have been obtained from a random sample of 12 providers chosen from a much larger population, prior to awarding a contract for these services:

a. Approximately how far is the average of these 12 quotes from the unknown mean for the entire population of providers?

b. Find the 95% confidence interval for the population mean quote.

c. Find the 99% confidence interval for the population mean quote.

d. Find the one-sided 95% confidence interval that claims that the population mean quote is no larger than some value.

e. Find the one-sided 99% confidence interval that claims that the population mean quote is no larger than some value.

a. Approximately how far is the average of these 12 quotes from the unknown mean for the entire population of providers?

b. Find the 95% confidence interval for the population mean quote.

c. Find the 99% confidence interval for the population mean quote.

d. Find the one-sided 95% confidence interval that claims that the population mean quote is no larger than some value.

e. Find the one-sided 99% confidence interval that claims that the population mean quote is no larger than some value.

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