from the table above, Fowle Marketing research, inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. A sample of 35 surveys provided the survey times shown in the file named Fowle. Based upon past studies, the population standard deviation is assumed known with 4 minutes. Is the premium rate justified?
Formulate the null and alternative hypotheses for this application. Compute the value of the test statistic. What is the p-value? At alpha = 0.01, what is your conclusion?
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