The following table lists the midterm and final exam scores for seven students in a statistics class.
a. Do you expect the midterm and final exam scores to be positively or negatively related?
b. Plot a scatter diagram. By looking at the scatter diagram, do you expect the correlation coefficient between these two variables to be close to zero, 1, or 1?
c. Find the correlation coefficient. Is the value of r consistent with what you expected in parts a and b?
d. Using a 1% significance level, test whether the linear correlation coefficient is positive.

  • CreatedAugust 25, 2015
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