Question: The following data on x = score on a measure of test anxiety and y = exam score for a sample of n = 9

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 €œEffects 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.

x 23 14 14 0 17 20 20 15 21 y 43 59 48 77 50 52 46 51 51

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