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Find the necessary sample size The weekly earnings of students in one age group are...

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Find the necessary sample size The weekly earnings of students in one age group are normally distributed with a standard deviation of 60 dollars A researcher wishes to estimate the mean weekly earnings of students in this age group Find the sample size needed to assure with 9 percent confidence that the sample mean will not differ from the population mean b more than 2 dollars O 4887 O 82 4908

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