1.{Narrative: Entrance exam}

Suppose a certain college has its own entrance exam.Suppose a95% confidence interval for the average of entrance exam score is between 80 and 140. These results were based on a sample of 100 students who took the exam.

{Entrance exam} What is the sample mean?

1. 80
2. 100
3. 110
4. 140

2.{Narrative: Entrance exam}

1. Suppose a certain college has its own entrance exam.Suppose a95% confidence interval for the average of entrance exam score is between 80 and 140. These results were based on a sample of 100 students who took the exam.

{Entrance exam}What is the margin of error?

1. 20
2. 30
3. 100
4. 80

3.{Narrative: Entrance exam}What is the standard error of the sample mean?

1. 5
3. 8
4. 10
5. 15

4.{Entrance Exam Narrative}Suppose the school decide that a student with 125 or high could register certain class.Do you think it is fair?

Yes,because 125 is in the interval

No,because 125 is not in the interval

Can't decide because there is not enough information.

None of the above.