# Question

The following data on x = score on a measure of test anxiety and y = exam score for a sample of n = 9 students are consistent with summary quantities given in the paper “Effects of Humor on Test Anxiety and Performance” (Psychological Reports [1999]: 1203–1212):

Higher values for x indicate higher levels of anxiety.

a. Construct a scatterplot, and comment on the features of the plot.

b. Does there appear to be a linear relationship between the two variables? How would you characterize the relationship?

c. Compute the value of the correlation coefficient. Is the value of r consistent with your answer to Part (b)?

d. Is it reasonable to conclude that test anxiety caused poor exam performance? Explain.

Higher values for x indicate higher levels of anxiety.

a. Construct a scatterplot, and comment on the features of the plot.

b. Does there appear to be a linear relationship between the two variables? How would you characterize the relationship?

c. Compute the value of the correlation coefficient. Is the value of r consistent with your answer to Part (b)?

d. Is it reasonable to conclude that test anxiety caused poor exam performance? Explain.

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