1. Page 452 #1. A simple random sample of 1088 adults between the ages of 18 and 44 is conducted. It is found that 261 of the 1088 adults smoke. Use a .05 significance level to test the claim that less than ¼ of such adults smoke.
2. Page 430 #10. A simple random sample of 106 body temperatures has a mean of 98.2 degrees F. Assume from previous studies that the standard deviation of all body temperatures is .62 degrees F. Use a .05 significance level to test the claim that the mean body temperature of the population is equal to 98.6 degrees F, as is commonly believed.
3. Page 452 #3. When planning for construction of a parkway, engineers must consider the weights of cars to be sure that the road surface is strong enough. A simple random sample of 32 cars yields a mean of 3605.3 lb and a standard deviation of 501.7 lb. Use a .01 significance level to test the claim that the mean weight of cars is less than 3700lb.
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