26 Refer to the previous exercise. Suppose the variables are ordinal. with levels (high. medium, low) for each classification.

a) Compute the numbers of concordant and discordant pairs

b) Compute gamma, and interpret.

c) Show how to express gamma as a difference between two proportions.

d) Using software. conduct a test of independence using gamma, and compare the result to the previous exercise Why is the P-value so much smaller here?