If you have not already done this for a previous exercise, create a variable that is the difference between baseline and prequiz heart rate. Then recode this new variable so that negative difference scores are assigned a numeric score of 1, positive difference scores are assigned a score of 2, and zero differences are assigned as missing. Perform a binomial test on this new variable with P = .5. Compare the p value from this test with the p value you obtained for the matched-pairs t test on the same two variables in Chapter 7. Explain the relationship between these two alternative tests of the same difference scores.