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question 9 Find the margin of error in using a sample size of 55 to predict the population mean at the 90% confidence level. (a)

question 9

Find the margin of error in using a sample size of 55 to predict the population mean at the 90% confidence level. (a) Given o = 12 O A. 2.07 O B. 2.70 O C. 2.66 O D. 2.10 (a) Given s = 12

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