Introduction To Statistics And Data Analysis

6th Edition

ISBN: 9781337793612

Author: PECK, Roxy.

Publisher: Cengage Learning,

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Textbook Question

Chapter 11.3, Problem 58E

Women diagnosed with breast cancer whose tumors have not spread may be faced with a decision between two surgical treatments—mastectomy (removal of the breast) or lumpectomy (only the tumor is removed). In a long-term study of the effectiveness of these two treatments, 701 women with breast cancer were randomly assigned to one of two treatment groups. One group received mastectomies and the other group received lumpectomies and radiation. Both groups were followed for 20 years after surgery. It was reported that there was no statistically significant difference in the proportion surviving for 20 years for the two treatments (Associated Press, October 17, 2002).

What hypotheses do you think the researchers tested in order to reach the given conclusion?

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Chapter 11.3, Problem 57E

Chapter 11.3, Problem 59E

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Chapter 11 Solutions

Introduction To Statistics And Data Analysis

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Solution Summary: The author explains the null and alternative hypotheses for the test. A sample of 701 women with breast cancer was assigned to two groups.

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