A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment with the drug, 20 subjects had a mean wake time of 106.9 min. After treatment the 20 subjects had a mean wake time of 69.6 minutes and a standard deviation of 42 minutes. Assume that the samples are from normally distributed population and are randomly selected. At the 0.05 significance level test the claim that after treatment with the drug subjects have a mean wake time of less than 106.9 minutes. Does it appear that the drug is effective?

A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment with the drug, 20 subjects had a mean wake time of 106.9 min. After treatment the 20 subjects had a mean wake time of 69.6 minutes and a standard deviation of 42 minutes. Assume that the samples are from normally distributed population and are randomly selected. At the 0.05 significance level test the claim that after treatment with the drug subjects have a mean wake time of less than 106.9 minutes. Does it appear that the drug is effective?

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Description: A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects.Before treatment with the drug, 20 subjects had a mean wake time of 106.9 min. After treatment the 20subjects had a mean wake time of 69.6 min

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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