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Mathematics 7 Online
OpenStudy (anonymous):

A random sample of 140 students is chosen from a population of 3,500 students. If the mean IQ in the sample is 105 with a standard deviation of 9, what is the 95% confidence interval for the students' mean IQ score? 100−120 107.9−112.1 103.5−106.5 108.66−111.34

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