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In an advertisement, a pizza shop claims its mean delivery time is 30 minutes. A consumer...

In an advertisement, a pizza shop claims its mean delivery time is 30 minutes. A consumer group believes that the mean delivery time is greater than the pizza shop claims. A random sample of 41 delivery times has a mean of 31.5 minutes with standard deviation of 3.5 minutes. Does this indicate at a 5% significance level that the mean delivery time is longer than what the pizza shop claims?

Step 1: State the null and alternative hypothesis.

Step 2: Calculate the test statistic.

Step 3: Find the p-value.

Step 4: State your conclusion in the context of the problem.

(Do not just say “Reject H0” or “Do not reject H0.”)

Math   Statistics-And-Probability   
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