# A better drug? In a pilot study, a companys new cholesterol-reducing drug outperforms

## Problem 49 Chapter 10.2

The Practice of Statistics | 5th Edition

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The Practice of Statistics | 5th Edition

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Problem 49

A better drug? In a pilot study, a companys new cholesterol-reducing drug outperforms the currently available drug. If the data provide convincing evidence that the mean cholesterol reduction with the new drug is more than 10 milligrams per deciliter of blood (mg/dl) greater than with the current drug, the company will begin the expensive process of mass-producing the new drug. For the 14 subjects who were assigned at random to the current drug, the mean cholesterol reduction was 54.1 mg/dl with a standard deviation of 11.93 mg/dl. For the 15 subjects who were randomly assigned to the new drug, the mean cholesterol reduction was 68.7 mg/dl with a standard deviation of 13.3 mg/dl. Graphs of the data reveal no outliers or strong skewness. (a) Carry out an appropriate significance test. What conclusion would you draw? (Note that the null hypothesis is not H0:m1 m2 = 0.) (b) Based on your conclusion in part (a), could you have made a Type I error or a Type II error? Justify your answer.

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Chapter2 Notes --- Displaying and Describing Categorical Data The Three Rules of Data Analysis Make a picture. Make a picture. Make apicture. Pictures … • Reveal things that can’t be seen in a table of numbers. • Show important features and patterns in the data. • Provide an excellent means for reporting findings to others Summarizing a Categorical Variable Example: The following...

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##### ISBN: 9781464108730

The full step-by-step solution to problem: 49 from chapter: 10.2 was answered by , our top Statistics solution expert on 03/19/18, 03:52PM. The answer to “A better drug? In a pilot study, a companys new cholesterol-reducing drug outperforms the currently available drug. If the data provide convincing evidence that the mean cholesterol reduction with the new drug is more than 10 milligrams per deciliter of blood (mg/dl) greater than with the current drug, the company will begin the expensive process of mass-producing the new drug. For the 14 subjects who were assigned at random to the current drug, the mean cholesterol reduction was 54.1 mg/dl with a standard deviation of 11.93 mg/dl. For the 15 subjects who were randomly assigned to the new drug, the mean cholesterol reduction was 68.7 mg/dl with a standard deviation of 13.3 mg/dl. Graphs of the data reveal no outliers or strong skewness. (a) Carry out an appropriate significance test. What conclusion would you draw? (Note that the null hypothesis is not H0:m1 m2 = 0.) (b) Based on your conclusion in part (a), could you have made a Type I error or a Type II error? Justify your answer.” is broken down into a number of easy to follow steps, and 170 words. Since the solution to 49 from 10.2 chapter was answered, more than 213 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: The Practice of Statistics, edition: 5. The Practice of Statistics was written by and is associated to the ISBN: 9781464108730. This full solution covers the following key subjects: . This expansive textbook survival guide covers 44 chapters, and 1409 solutions.

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