13th Edition

ISBN: 9780135900826

Author: Triola

Publisher: PEARSON

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Textbook Question

Chapter 9.4, Problem 7BSC

In Exercises 5–16, test the given claim.

7. Testing Effects of Alcohol Researchers conducted an experiment to test the effects of alcohol. Errors were recorded in a test of visual and motor skills for a treatment group of 22 people who drank ethanol and another group of 22 people given a placebo. The errors for the treatment group have a standard deviation of 2.20, and the errors for the placebo group have a standard deviation of 0.72 (based on data from “Effects of Alcohol Intoxication on Risk Taking, Strategy, and Error Rate in Visuomotor Performance,” by Streufert et al., Journal of Applied Psychology, Vol. 77, No. 4). Use a 0.05 significance level to test the claim that the treatment group has errors that vary significantly more than the errors of the placebo group.

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Chapter 9.4, Problem 6BSC

Chapter 9.4, Problem 8BSC

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Chapter 9 Solutions

ELEMENTARY STATS. 18 WEEK ACCESS CODE

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Solution Summary: The author concludes that there is enough evidence to support the claim that the treatment group has errors that vary significantly more than the placebo group.

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