# A new concrete mix is being designed to provide adequate compressive strength for concrete blocks. The...

###### Question:

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. (True or False) The P-value calculated for testing H0 : µ ≤ 1350 versus H1 : µ > 1350 is not a small probability; hence, we can conclude that the mean is greater than 1350 kPa and that the blocks meet the specification.

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