Statement of a problem № m40699


Another department of motor vehicles office claims that the mean wait time is at most 18 minutes. A random sample of 12 people has a mean wait time of 15 minutes with a standard deviation of 2.2 minutes. At α = 0.05, test the office’s claim. Assume the population is normally distributed. a. Identify the claim and state H0 and Ha. b. Use technology to find the P-value. c. Compare the P-value with the level of significance a and make a decision. d. Interpret the decision in the context of the original claim.

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