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4. Page 452 #5. Among 30,617 randomly selected adults, 5787 consumed herbs within the past 12...

4. Page 452 #5. Among 30,617 randomly selected adults, 5787 consumed herbs within the past 12 months. Use a .01 significance level, to test the claim that fewer than 20% of adults consumed herbs within the past 12 months.


5. Page 441 #27. The Insurance Institute for Highway Safety conducted tests with crashes of new cars traveling at 6 mph. The total cost of the damage was found. Results are listed below for a simple random sample of the tested cars. Use a .05 significance level to test the claim that when tested under the same standard conditions, the damage costs for the population of cars has a mean of $5000.


6. Page 441 #24. The heights of a random sample of 9 supermodels are found to have a mean of 70 inches and a standard deviation of 1.5 inches. Use a .01 significance level to test the claim that supermodels have heights with a mean that is greater than the mean height of 63.6 inches for women in the general population.

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