PHI 2600-A sample of size 107 from a population

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January 3rd, 2018

A sample of size 107 from a population having standard deviation?= 7 produced a mean of 44. The 99% confidence interval for the population mean (rounded to two decimal places) is:The lower limit isThe upper limit isThe mean federal income tax paid last year by a random sample of 44 persons selected from a city was $4253. Suppose the standard deviation of tax paid in this city is ? = $959. The 95% confidence interval for the population mean (rounded to two decimal places) is:The lower limit is $The upper limit is $

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