30 smokers were questioned about the number of hours they sleep each day. We want to test the hypothesis that the smokers need less sleep than the general public which needs an average of 7.7hours of sleep. Note: This is a left-tailed test which means that if z-score is less than the corresponding value, null hypothesis will be rejected. a) State the decision rule including the graph. b) If the sample mean is 7.0, and the population standard deviation is 0.5, what can you conclude?

30 smokers were questioned about the number of hours they sleep each day. We want to test the hypothesis that the smokers need less sleep than the general public which needs an average of 7.7hours of sleep. Note: This is a left-tailed test which means that if z-score is less than the corresponding value, null hypothesis will be rejected. a) State the decision rule including the graph. b) If the sample mean is 7.0, and the population standard deviation is 0.5, what can you conclude?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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