2. Use the data in Chapter 15 Data Set 1 to answer the questions below. Do the analysis manually or using the Data Analysis tools. a. Compute the correlation between motivation and GPA. b. Test for the significance of the correlation coefficient at the .05 level using a two-tailed test. c. The more highly you are motivated, the more you will study— true or false? Which did you select and why?
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First, we need to compute the correlation coefficient (r) between motivation and GPA. The formula for the correlation coefficient is: $$r = \frac{n(\sum xy) - (\sum x)(\sum y)}{\sqrt{[n(\sum x^2) - (\sum x)^2][n(\sum y^2) - (\sum y)^2]}}$$ where x represents Show more…
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