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3. A local college is studying the number of credit hours students take and how many...

3. A local college is studying the number of credit hours students take and how many total minutes they spend reading for fun/pleasure (e.g., non-class-related materials). They don’t know whether to expect that students will read more or less when enrolled in a lot of classes/hours or fewer hours. They study 68 students and find a correlation of -0.30.

(A) State the decision rule for the 0.05 significance level.

Reject H0 if t > _________

(B) Compute the value of the test-statistic: __________________

(C) Can we conclude that the correlation in the population is different than zero?

Select one: “Reject H0” or “do not reject H0” We conclude that the correlation in the population is zero. (can or cannot) (less than or greater than)

(D) Explain what this means – how are these variables related. Is it strong, weak, moderate? Estimate a scatterplot of these data with a rough sketch – be sure to label the axes. Think about what to put on the xaxis and what to place on the y-axis.

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