Biting rates of flies. The biting rate of a particular species of fly was investigated in a study reported in the Journal of the American Mosquito Control Association (Mar. 1995). Biting rate was defined as the number of flies biting a volunteer during 15 minutes of exposure. The species of fly being investigated was known to have a median biting rate of 5 bites per 15 minutes on Stanbury Island, Utah. However, it is theorized that the median biting rate is higher in bright, sunny weather. To test this theory, 122 volunteers were exposed to the flies during a sunny day on Stanbury Island. Of these volunteers, 95 experienced biting rates greater than 5.
a. Set up the null and alternative hypotheses for the test.
b. Calculate the approximate p-value of the test. [Hint: Use the normal approximation for a binomial probability.]
c. Make the appropriate conclusion at α = .01.
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