In: Statistics and Probability
Problem 3. To obtain information on the corrosion-resistance properties of a certain type of steel conduit, 25 specimens are buried in soil for a 2-year period. The maximum penetration (in mils) for each specimen is then measured, yielding the following values
50.2 50.7 50.5 51.5 48.9
46.6 48.3 50.2 50.5 51.6
52.9 53.3 53.4 48.5 53.4
52.7 52.1 51.3 49.9 50.2
51.8 51.9 51.0 52.2 51.8
The conduits were manufactured with the specification that true average penetration be at most 50 mils. What would you conclude?