A researcher wishes to demonstrate that the average number of calories in a beef hot dog exceeds the average number of calories in a other meat hot dogs by at least 20. To that end the sample brands of meat hot dogs and and beef hot dogs and the data is in the table below: Beef Hot Dogs Meat Hot Dogs X1 = 140.2 X2 = 114.6 S1 = 8.2 $2 = 12.4 n1 = 9 n = 12 The researcher will test the hypothesis Ho : M1 - M2 = 20 against H1 : M1 - M2