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lolopink21:
A random sample of 150 students is chosen from a population of 5,000 students. The mean IQ in the sample is 110, with a standard deviation of 10. What is the 95% confidence interval for the students' mean IQ score? 100–120 107.9–112.1 108.4–111.6 108.66–111.34
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LadyRavyRay:
The critical value for a 95% C.I. is about , so the 95% C.I. for this sample is
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