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If X = 75 ,0 = 25 and n=41 and assuming that the population is normally distributed, what is/are the critical value(s) for a 91%

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If X = 75 ,0 = 25 and n=41 and assuming that the population is normally distributed, what is/are the critical value(s) for a 91% confidence interval estimate for the population mean, ? Rounded to 4 decimal places O-1.8644 and 1.8644 68.3806 and 81.6194 -1.9402 and 1.9402 -1.7975 and 1.7975 -1.6954 and 1.6954 -1.7375 and 1.7375

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