Question 8:  Which of the following is the definition of the "best point estimate" in confidence interval for proportion?   The sample statistic

Question 8: 

Which of the following is the definition of the "best point estimate" in confidence interval for proportion?

  The sample statistic. 

  The sample size. 

  The poputlaion mean.

Question 9

The distance between the upper and lower bounds of the confidence interval is called   .   .   .

  confidence level. 

  confidence center. 

  confidence width.

Question 14

For questions 14 - 16: A researcher found that a 99% confidence interval for the mean hours per week spent studying by college students was (13, 17) hours.

The margin of error of this confidence interval is . . .

2

Question 15

For questions 14 - 16: A researcher found that a 99% confidence interval for the mean hours per week spent studying by college students was (13, 17) hours.

The sample mean for this scenario is . . .

Question 16

For questions 14 - 16: A researcher found that a 99% confidence interval for the mean hours per week spent studying by college students was (13, 17) hours.

Decreasing the confidence level to 90%, while holding the sample size the same, which of the following will be the correct confidence interval?

  (13, 17) 

  (14, 16) 

  can not be determined 

Question 17

Increasing the sample size, while holding the confidence level the same, will do what to the length of your confidence interval? 

  Make it narrow. 

  It will stay the same. 

  Cannot be determined.