50. The correct answer in Problem 8.45 implies that if the chi-squared statistic is used for a contingency table having ordered categones in both duections. then (select the correct response(s)):

a) The statistic actually treats the variables as nominal.

b) Information about the ordering is ignored.

c) The test is usually not as powerful for detecting association as a test statisuc based on numbers of concordant and discordant pairs

d) The statistic cannot differentiate between positive and negative associations