A local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. The owner of the store has determined that home delivery will be successful only if the average time spent on a delivery does not exceed 28 minutes. The owner has randomly selected 24 customers and delivered pizzas to their homes in order to test whether the mean delivery time actually exceeds 28 minutes. What assumption is necessary for this test to be valid?
Added by Wendy B.
Step 1
- Alternative Hypothesis (H1): The average delivery time exceeds 28 minutes (μ > 28). **Step 2:** Assumptions necessary for the test to be valid: Show more…
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A local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. The owner of the store has determined the home delivery will be successful if the mean time spent on the deliveries does not exceed 30 minutes. The owner has randomly selected 45 customers and has delivered pizzas to their homes. Sample mean was found to be 31.4 minutes with a standard deviation of 4.5 minutes. Is there a strong evidence that on average it takes more than 30 minutes for home delivery?
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