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Find a approximate confidence interval for population mean

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Problem 1: A random sample of 70 observations from a normally distributed population produced a mean of x=26.2 and a standard deviation of s= 4.1. Find a approximate 99% confidence interval for the population mean, u.

a) 26.4 + .156
b) 28.3 + .155
c) 26.2 + .1.26
d) 25.1 + .169

Reference no: EM132746302

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