a. Explanation Given info: The survey was taken to test the effectiveness of the carbolic acid to test its effectiveness. Justification: Observational study: If the examiner monitors the behavior of the individuals and provides the conclusions for the study, then the study is an observational study. In other words, the examiner only observes what is occurring or what has occurred in the past and gives inferences for the study... b. To determine Test whether there is evidence that the carbolic acid is effective in increasing the survival rate of the patients. c. To determine Explain the reservation that arises in the design of the study.

Intro Stats, Books a la Carte Edition (5th Edition)

5th Edition

ISBN: 9780134210285

Author: Richard D. De Veaux, Paul Velleman, David E. Bock

Publisher: PEARSON

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Chapter R, Problem 5.3RE

To determine

Identify the type of study.

To determine

Test whether there is evidence that the carbolic acid is effective in increasing the survival rate of the patients.

To determine

Explain the reservation that arises in the design of the study.

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Chapter R, Problem 5.2RE

Chapter R, Problem 5.4RE

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Surgery and germs. Joseph Lister (for whom Listerineis named!) was a British physician who was interestedin the role of bacteria in human infections. He suspectedthat germs were involved in transmitting infection, so hetried using carbolic acid as an operating room disinfectant.In 75 amputations, he used carbolic acid 40 times. Of the40 amputations using carbolic acid, 34 of the patientslived. Of the 35 amputations without carbolic acid,19 patients lived. The question of interest is whethercarbolic acid is effective in increasing the chances ofsurviving an amputation.a) What kind of a study is this?b) What do you conclude? Support your conclusion bytesting an appropriate hypothesis.c) What reservations do you have about the design ofthe study?

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Chapter R Solutions

Intro Stats, Books a la Carte Edition (5th Edition)

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Identify the type of study.

Solution Summary: The author explains the type of study: observational, experimental, and independent.

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Identify the type of study.

Test whether there is evidence that the carbolic acid is effective in increasing the survival rate of the patients.

Explain the reservation that arises in the design of the study.

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Chapter R Solutions