Bundle: Statistics for the Behavioral Sciences, Loose-leaf Version, 10th + Aplia, 1 term Printed Access Card
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 23P
To determine

  1. Conversion of the data from this problem into a form suitable for the point-biserial correlation (use 1 for the money and 0 for the plain paper), and then compute the correlation.
  2. Square of the value of the point-biserial correlation to obtain r 2 .
  3. The t test in chapter 10 produced t=3.57 with df=16 . Use the equation on p. 518 to compute the value of r 2 directly from the t statistic and its df .Within rounding error, the value of r 2 from the equation should be equal to the value obtained from the point-biserial correlation.

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