Elementary Statistics Third California Edition

3rd Edition

ISBN: 9781323578179

Author: Triola

Publisher: PEARSON C

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Textbook Question

Chapter 9.2, Problem 21BSC

Larger Data Sets. In Exercises 21–24, use the indicated Data Sets in Appendix B. The complete data sets can be found at www.TriolaStats.com. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal.

21. Do Men Talk Less Than Women? Refer to Data Set 24 “Word Counts” and use the measured word counts from men in the third column and the measured word counts from women in the fourth column. Use a 0.05 significance level to test the claim that men talk less than women.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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Chapter 9.2, Problem 20BSC

Chapter 9.2, Problem 22BSC

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Chapter 9 Solutions

Elementary Statistics Third California Edition

Ch. 9.1 - Verifying Requirements In the largest clinical...Ch. 9.1 - Verifying Requirements In the largest clinical...Ch. 9.1 - Hypotheses and Conclusions Refer to the hypothesis...Ch. 9.1 - Using Confidence Intervals a. Assume that we want...Ch. 9.1 - Interpreting Displays. In Exercises 5 and 6, use...Ch. 9.1 - Treating Carpal Tunnel Syndrome Carpal tunnel...Ch. 9.1 - Testing Claims About Proportions. In Exercises...Ch. 9.1 - Accuracy of Fast Food Drive-Through Orders In a...Ch. 9.1 - Testing Claims About Proportions. In Exercises...Ch. 9.1 - Testing Claims About Proportions. In Exercises...

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Solution Summary: The author concludes that there is no evidence to infer that the men talk less than women.

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