Bundle: Cengage Advantage Books: Essentials of Statistics for the Behavioral Sciences, 8th + LMS Integrated for MindTap Psychology, 1 term (6 months) Printed Access Card
8th Edition
ISBN: 9781305617742
Author: Frederick J Gravetter, Larry B. Wallnau
Publisher: Cengage Learning
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Textbook Question
Chapter 8.6, Problem 2LC
For a 5-point treatment effect, a researcher computes power of p = 0.50 for a two-tailed hypothesis test with α = .05.
- a. Will the power increase or decrease for a 10-point treatment effect?
- b. Will the power increase or decrease if alpha is changed to α = .01?
- c. Will the power increase or decrease if the researcher changes to a one-tailed test?
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Chapter 8 Solutions
Bundle: Cengage Advantage Books: Essentials of Statistics for the Behavioral Sciences, 8th + LMS Integrated for MindTap Psychology, 1 term (6 months) Printed Access Card
Ch. 8.1 - The city school district is considering increasing...Ch. 8.1 - Prob. 2LCCh. 8.1 - Prob. 3LCCh. 8.1 - A researcher selects a sample of n = 16...Ch. 8.1 - A small value (near zero) for the z-score...Ch. 8.1 - Prob. 3LCACh. 8.2 - Prob. 1LCCh. 8.2 - Prob. 2LCCh. 8.2 - Prob. 3LCCh. 8.2 - Prob. 4LC
Ch. 8.2 - If a sample mean is in the critical region with =...Ch. 8.3 - Prob. 1LCCh. 8.3 - In a research report, the term significant is used...Ch. 8.3 - Prob. 3LCCh. 8.3 - Prob. 4LCCh. 8.3 - Prob. 5LCCh. 8.4 - A researcher selects a sample from a population...Ch. 8.4 - Prob. 2LCCh. 8.4 - A researcher obtains z = 2.43 for a hypothesis...Ch. 8.5 - Prob. 1LCCh. 8.5 - A researcher selects a sample from a population...Ch. 8.5 - Prob. 3LCCh. 8.6 - Prob. 1LCCh. 8.6 - For a 5-point treatment effect, a researcher...Ch. 8.6 - Prob. 3LCCh. 8.6 - Prob. 4LCCh. 8 - The value of the z-score in a hypothesis test is...Ch. 8 - Define the alpha level and the critical region,...Ch. 8 - Although there is a popular belief that herbal...Ch. 8 - Childhood participation in sports, cultural...Ch. 8 - A local college requires an English composition...Ch. 8 - A random simple is selected from a normal...Ch. 8 - A random sample of n = 25 scores is selected from...Ch. 8 - Brunt, Rhee, and Zhong (2008) surveyed 557...Ch. 8 - A random simple is selected from a normal...Ch. 8 - In a study examining the effect of alcohol on...Ch. 8 - The researchers cited in the previous problem...Ch. 8 - There is some evidence indicating that people with...Ch. 8 - Researchers at a National Weather Center in the...Ch. 8 - Montarello and Martens (2005) found that...Ch. 8 - Researchers hate noted a decline in cognitive...Ch. 8 - A researcher plans to conduct an experiment...Ch. 8 - A sample of n = 40 is selected from a normal...Ch. 8 - Briefly explain how increasing sample size...Ch. 8 - Explain how the power of a hypothesis test is...Ch. 8 - A researcher is investigating the effectiveness of...Ch. 8 - A researcher is evaluating the influence of a...Ch. 8 - Find each of the requested values for a population...Ch. 8 - A survey of high school seniors shows that the...Ch. 8 - Miller (2008) examined the energy drink...
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