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A clinical trial was planned to compare the effect of a new active treatment with that of the standard treatment. Before they started the trial, the 11 subjects who were to receive the new treatment had scores with a sample standard deviation of 6.9, whereas the 9 subjects who were to receive the standard treatment had scores with a sample standard deviation of 5.2. (a) Carry out an appropriate hypothesis test to determine whether the populations from which the two samples are drawn have the same variance. State all the details for your hypothesis test clearly. (b) State clearly the assumptions you need for your test to be valid. (c) Calculate a 95% confidence interval for the ratio of the variances, stating clearly the ratio you are using.

A clinical trial was planned to compare the effect of a new active treatment with that of the standard treatment. Before they started the trial, the 11 subjects who were to receive the new treatment had scores with a sample standard deviation of 6.9, whereas the 9 subjects who were to receive the standard treatment had scores with a sample standard deviation of 5.2. (a) Carry out an appropriate hypothesis test to determine whether the populations from which the two samples are drawn have the same variance. State all the details for your hypothesis test clearly. (b) State clearly the assumptions you need for your test to be valid. (c) Calculate a 95% confidence interval for the ratio of the variances, stating clearly the ratio you are using.

MATLAB: An Introduction with Applications
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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A clinical trial was planned to compare the effect of a new active treatment with that of the standard treatment. Before they started the trial, the 11 subjects who were to receive the new treatment had scores with a sample standard deviation of 6.9, whereas the 9 subjects who were to receive the standard treatment had scores with a sample standard deviation of 5.2. (a) Carry out an appropriate hypothesis test to determine whether the populations from which the two samples are drawn have the same variance. State all the details for your hypothesis test clearly. (b) State clearly the assumptions you need for your test to be valid. (c) Calculate a 95% confidence interval for the ratio of the variances, stating clearly the ratio you are using.
Transcribed Image Text:A clinical trial was planned to compare the effect of a new active treatment with that of the standard treatment. Before they started the trial, the 11 subjects who were to receive the new treatment had scores with a sample standard deviation of 6.9, whereas the 9 subjects who were to receive the standard treatment had scores with a sample standard deviation of 5.2. (a) Carry out an appropriate hypothesis test to determine whether the populations from which the two samples are drawn have the same variance. State all the details for your hypothesis test clearly. (b) State clearly the assumptions you need for your test to be valid. (c) Calculate a 95% confidence interval for the ratio of the variances, stating clearly the ratio you are using.
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