Question: a. What sample size should be used to determine the average monthly household expenditure? b. After the survey was conducted, the average expenditure was found

a. What sample size should be used to determine the average

a. What sample size should be used to determine the average monthly household expenditure? b. After the survey was conducted, the average expenditure was found to be $90.30 and the standard deviation was $45. Construct a 95 percent confidence interval. What can be said about the level of precision

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