The data on cube compressive strength (mpa) of concrete specimens are as follows:
112.3, 97.0, 92.7, 86.0, 102.0, 99.2, 95.8, 103.5, 89.0, 86.7. assume the compressive strength for this type of concrete is normally distributed. suppose the concrete will be used for a particular application unless there is strong evidence that true average strength is less than 100 mpa.
1. should the concrete be used?
2. carry out a test of appropriate hypotheses using the p-value method