An online survey company claims their surveys take on average less than 20 minutes to complete. Before running a new ad campaign, they need data to prove that the average completion time is actually less than 20 minutes. The company randomly samples 15 surveys taken in the last week and found a sample mean of 17 minutes with a sample standard deviation of 5 minutes. Using a 5% significance level and the p-value you found in the previous question. What is the correct decision for this test? Fail to Reject HA, because the p-value is less than significance level. Reject H0, because the p-value is more than significance level. Reject H0, because the p-value is less than significance level. Fail to Reject H0, because the p-value is more than significance level.
An online survey company claims their surveys take on average less than 20 minutes to complete. Before running a new ad campaign, they need data to prove that the average completion time is actually less than 20 minutes. The company randomly samples 15 surveys taken in the last week and found a sample mean of 17 minutes with a sample standard deviation of 5 minutes.
Using a 5% significance level and the p-value you found in the previous question. What is the correct decision for this test?
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Fail to Reject HA, because the p-value is less than significance level. |
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Reject H0, because the p-value is more than significance level. |
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Reject H0, because the p-value is less than significance level. |
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Fail to Reject H0, because the p-value is more than significance level. |
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