A new 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...

A new 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 1356 kPa and their standard deviation is 70 kPa. A test is made of H0 :μ ≤ 1350 versus H1 :μ > 1350.

a. Find the P-value.

b. Do you believe it is plausible that the blocks do not meet the specification, or are you convinced that they do? Explain your reasoning.