Critical value(s): -1.476 (If there are two critical values, list both values separated by a comm Find the test statistic. 0.673 X Find the p-value.Medical researchers performed a comparison of two drugs, clopidogrel and ticagrelor, which are designed to reduce the risk of heart attack or stroke in coronary patients. A total of 5454 patients were given clopidogrel, and 6467 were given ticagrelor. Of the clopidogrel patients, 556 suffered a heart attack or stroke within one year, and, of the ticagrelor patients, 564 suffered a heart attack or stroke. Can you conclude that the proportion of patients suffering a heart attack or stroke is less for ticagrelor? Use the a = 0.07 level. a. State the null and alternative hypotheses. Ho: V P2 H1 : piv SV p2 V