Statistics for the Behavioral Sciences, Loose-leaf Version
10th Edition
ISBN: 9781305862807
Author: GRAVETTER
Publisher: CENGAGE L
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Chapter 8, Problem 17P
A high school teacher has designed a new course intended to help students prepare for the mathematics section of the SAT. A sample of
a. Can the teacher conclude that students who take the course score significantly higher than the general population? Use a one-tailed test with
h. Compute Cohen’s d to estimate the size of the effect.
c. Write a sentence demonstrating how the results of the hypothesis test and the measure of effect size would appear in a research report.
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Chapter 8 Solutions
Statistics for the Behavioral Sciences, Loose-leaf Version
Ch. 8 - Identify the four steps of a hypothesis test as...Ch. 8 - Define the alpha level and the critical region for...Ch. 8 - Define a Type I error and a Type Il error and...Ch. 8 - If the alpha level is changed from =.05 to =.01...Ch. 8 - The value of the z-score in a hypothesis test is...Ch. 8 - Although there is a popular belief that herbal...Ch. 8 - Babcock and Marks (2010) reviewed survey data from...Ch. 8 - Childhood participation in sports, cultural...Ch. 8 - The psychology department is gradually changing...Ch. 8 - A random sample is selected from a normal...
Ch. 8 - A random sample of n=25scores is selected from a...Ch. 8 - Brunt, Rhee, and Zhong (2008) surveyed 557...Ch. 8 - A random sample 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 - Researchers at a National Weather Center in the...Ch. 8 - A high school teacher has designed a new course...Ch. 8 - Researchers have noted a decline in cognitive...Ch. 8 - A researcher is evaluating the influence of a...Ch. 8 - A researcher plans to conduct an experiment...Ch. 8 - Research has shown that IQ scores have been...Ch. 8 - Briefly explain how increasing sample size...Ch. 8 - W23. Explain how the power of a hypothesis test is...
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