Question: 90 An important quality characteristic used manufacturer of Boston and Vermont asphalt shi amount of moisture the shingles contain when they are packaged. Customers may feel that they have product lacking in quality if they find moist shingles inside the packaging. In some case excessive moisture can cause the granules attached to the shingle for texture and coloring purposes to fall off the shingle causing appearance problems. To monitor the amount moisture present, the company conducts moisture tests. A shingle is weighed and then dried. The shingle is then reweighed, and, based on the amount of moisture taken out of the product, the pounds of moisture per 100 square feet are calculated. The company would like to s mean moisture content is less than 0.35 pounds per square feet. The data file moisture.xls includes 36 measurements (in pounds per 100 square feet) for Boston shingles and 31 for Vermont shingles.

a. For the Boston shingles, is there evidence level of significance that the mean moisture less than 0 35 pounds per 100 square feet?

b. Interpret the meaning of the p-value in (a).

c. For the Vermont shingles, is there evidence level of significance that the mean moist less than 0.35 pounds per 100 square feet?

d. Interpret the meaning of the p-value in (c).