Strength of concrete: The compressive strength, in kilopascals, was measured for concrete blocks from five different batches of concrete, both three and six days after pouring. The data are as follows. Can you conclude that the mean strength after three days is greater than the mean strength after six days? Let H, represent the mean strength after three days and (I. = u, - u,. Use the a = 0. 10 level and the P-value method with the TI-84 Plus calculator. Block After 3 days 1370 1326 1380 1389 1358 After 6 days 1325 1305 1332 1318 1375 Send data to Excel Part: 0 / 4 Part 1 of 4 (a) State the null and alternate hypotheses. D:0 0>0 0-0 This hypothesis test is a (Choose one) * test. X