A medical researcher wishes to investigate the effectiveness of exercise versus diet in losing weight. A group of 30 overweight adult subjects have two different treatments. First, they are placed on a regular program of vigorous exercise, but with no restriction on diet. Then they are placedon a strict diet, but with no requirement to exercise. The weight losses after 20 weeks on each treatment are determined and the differences in weight loss between two treatments are computed for each individual. The mean of these differences in weight loss is found to be -1.95 lb withstandard deviation s = 4 Ib. Assume all conditions for inference are met for the questions below.Suppose you are interested in whether there is evidence of a significant difference in mean weight loss for the two methods. The significance level is chosen to be 5%.(I) Write the hypotheses to answer the question.(II) Compute the t-statistic (the test statistic here). Answer to two decimal places.(III) Compute the p-value. Use t-distribution. Answer to four decimal places.(IV) Explain what a Type I error means in the context of this problem.

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A medical researcher wishes to investigate the effectiveness of exercise versus diet in losing weight. A group of 30 overweight adult subjects have two different treatments. First, they are placed on a regular program of vigorous exercise, but with no restriction on diet. Then they are plac on a strict diet, but with no requirement to exercise. The weight losses after 20 weeks on each treatment are determined and the differences in weight loss between two treatments are computed for each individual. The mean of these differences in weight loss is found to be -1.95 Ib with standard deviation s-4 lb. Assume all conditions for inference are met for the questions below. Suppose you are interested in whether there is evidence of a significant difference in mean weight loss for the two methods. The significance level is chosen to be 5%. (1) Write the hypotheses answer the question. (II) Compute the t-statistic (the test statistic here). Answer to two decimal places. (III) Compute the p-value. Use t-distribution. Answer to four decimal places. (IV) Explain what a Type I error means in the context of this problem.

A medical researcher wishes to investigate the effectiveness of exercise versus diet in losing weight. A group of 30 overweight adult subjects have two different treatments. First, they are placed on a regular program of vigorous exercise, but with no restriction on diet. Then they are plac on a strict diet, but with no requirement to exercise. The weight losses after 20 weeks on each treatment are determined and the differences in weight loss between two treatments are computed for each individual. The mean of these differences in weight loss is found to be -1.95 Ib with standard deviation s-4 lb. Assume all conditions for inference are met for the questions below. Suppose you are interested in whether there is evidence of a significant difference in mean weight loss for the two methods. The significance level is chosen to be 5%. (1) Write the hypotheses answer the question. (II) Compute the t-statistic (the test statistic here). Answer to two decimal places. (III) Compute the p-value. Use t-distribution. Answer to four decimal places. (IV) Explain what a Type I error means in the context of this problem.

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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