Bundle: Statistics for the Behavioral Sciences, Loose-leaf Version, 10th + Aplia, 1 term Printed Access Card
10th Edition
ISBN: 9781337129039
Author: Frederick J Gravetter, Larry B. Wallnau
Publisher: Cengage Learning
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Chapter 15, Problem 24P
Studies have shown people with high intelligence are generally more likely to volunteer as participants in research, but no for research that involves unusual experiences such as hypnosis. To examine this phenomenon, a researcher administers a questionnaire to a sample of college students. The survey asks for the student’s grade point average (as a measure of Intelligence) and whether the student would like to take part in a future study in which participants would be hypnotized. The results Showed that 7 of the 10 lower intelligence people were willing to participant but only 2 of the 10 higher intelligence people were willing.
a. Convert the data to a form suitable for computing the phi-coefficient. (Code the two intelligence categories as 0 and 1 for the X variable, and code the willingness to participate as 0 and 1 for the Y variable.)
b. Compute the phi-coefficient for the data.
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Chapter 15 Solutions
Bundle: Statistics for the Behavioral Sciences, Loose-leaf Version, 10th + Aplia, 1 term Printed Access Card
Ch. 15 - What information is provided by the sign (+ or -)...Ch. 15 - What information is provided by the numerical...Ch. 15 - Calculate SP (the sum of products of deviations)...Ch. 15 - Calculate SP (the sum of products of deviations)...Ch. 15 - For the following scores, X Y 2 7 5 4 4 7 7 5 2 6...Ch. 15 - For the following scores, X Y 0 4 2 9 1 6 1 9 a....Ch. 15 - For the following scores, X Y 4 0 1 5 1 0 4 5 a....Ch. 15 - For the following scores, X Y 3 6 5 5 6 0 6 2 5 2...Ch. 15 - With a small sample, a single point can have a...Ch. 15 - For the following scores, X Y 4 5 6 5 3 2 9 4 6 5...
Ch. 15 - Correlation studies are often used to help...Ch. 15 - In the Chapter Preview we discussed a study by...Ch. 15 - The researchers cited in the previous problem also...Ch. 15 - 14. Identifying individuals with a high risk of...Ch. 15 - 15. For a two-tailed test with =.05 , use Table...Ch. 15 - 16. As we have noted in previous chapters, even a...Ch. 15 - 17. A researcher measures three variables, X, V,...Ch. 15 - A researcher records the annual number of serious...Ch. 15 - 19. A common concern for students (and teachers)...Ch. 15 - It appears that there is a significant...Ch. 15 - Prob. 21PCh. 15 - Prob. 22PCh. 15 - Prob. 23PCh. 15 - Studies have shown people with high intelligence...
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