Anew concrete mix is being designed to provide adequate compressive strength for concrete blocks. the specification for a particular application calls for the blocks to have a mean compressive strength μ greater than 1350 kpa. a sample of 100 blocks is produced and tested. their mean compressive strength is 1358 kpa and their standard deviation is 75 kpa. a test is made of h0 : µ ≤ 1350 versus h1 : µ > 1350.] a) do you believe it is plausible that the blocks do not meet the specification, or are you convinced that they do? explain your reasoning by carrying out the appropriate hypothesis test.

b) if a sample of 10 blocks is produced and tested with their mean compressive strength at 1372 kpa and their standard deviation at 68 kpa. find the p-value based on the same hypothesis.