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19-12-2022
Mathematics

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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 , represent the mean strength after three days and H=H, . Use the a-0.05 level and the P-value method with the table. Block After 3 days After 6 days 1384 1344 1341 1343 1386 1307 1382 1325 1349 1301 Send data to Excel TE Part 1 of 5 (a) State the appropriate null and alternate hypotheses. This is a right-tailed test. Part: 1/5 Part 2 of 5 (b) Compute the test statistic. Round the answer to at least three decimal places.

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