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.


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  • CreatedSeptember 19, 2015
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