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The Mean Federal Income Tax Paid Last Year by a Random

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The mean federal income tax paid last year by a random sample of 45 persons selected from a city was $4,242.Suppose the standard deviation of tax paid in this city is The mean federal income tax paid last year by a random sample of 45 persons selected from a city was $4,242.Suppose the standard deviation of tax paid in this city is = $991.The 95% confidence interval for the population mean (rounded to two decimal places)is: = $991.The 95% confidence interval for the population mean (rounded to two decimal places)is:

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