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. A sponsor for the website does a larger independent study and concluded that the average completion time for the surveys is not less than 20 minutes. If this larger independent study is correct, which of the following is true about the hypothesis test we ran in the previous questions? The test we performed came to the same conclusion as the larger independent study. The test we performed came to the opposite conclusion, so we made a Type I Error. The test we performed came to the opposite conclusion, so we made a Type II Error. The test we performed came to the same conclusion, so we made a Standard Error.
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.
A sponsor for the website does a larger independent study and concluded that the average completion time for the surveys is not less than 20 minutes.
If this larger independent study is correct, which of the following is true about the hypothesis test we ran in the previous questions?
|
The test we performed came to the same conclusion as the larger independent study. |
||
|
The test we performed came to the opposite conclusion, so we made a Type I Error. |
||
|
The test we performed came to the opposite conclusion, so we made a Type II Error. |
||
|
The test we performed came to the same conclusion, so we made a Standard Error. |
Step by step
Solved in 2 steps
