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Mathematics 13 Online
OpenStudy (gabylovesyou):

A random sample of 145 students is chosen from a population of 4,250 students. If the mean IQ in the sample is 130 with a standard deviation of 7, what is the 90% confidence interval for the students' mean IQ score? 98.98−101.02 109−112. 125−135 129.05−130.95 < --- @phi

OpenStudy (phi):

refresh my memory on the steps.

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