Finding Confidence Intervals. In Exercises 9-16, assume that each sample is a simple random sample obtained from
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Finding Confidence Intervals. In Exercises 9-16, assume that each sample is a simple random sample obtained from a population with a normal distribution.
Professor Evaluation Scores Listed below are student evaluation scores of professors from Data Set 28 "Course Evaluations" in Appendix B. Construct a 95% confidence interval estimate of o for each of the two data sets. Does there appear to be a difference in variation?
Female
4.4
3.4
4.8
2.9
4.4
4.9
3.5
3.7
3.4
4.8
Males
4.0
3.6
4.1
4.1
3.5
4.6
4.0
4.3
4.5
4.3
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