Hunter is writing a report on the backgrounds of American presidents. He finds that the mean age of the 45 presidents is 55 years with the standard deviation of 6.59 years. Because Hunter took a statistics course, he calculates a 95% confidence interval for the mean age of all men who have been president to be 55 ± 1.98. Comment on this result. Question 8 options: Hunter can be 95% confident that the mean age of all presidents is 55 years. 95% of all the ages of the presidents lie between 55 ± 1.98. Hunter should have taken a larger sample to reduce the margin of error. Hunter is 95% confident that the mean age of all presidents lies between 53.02 and 56.98 years. The confidence interval makes no sense since Hunter has the entire population of ages.
Hunter is writing a report on the backgrounds of American presidents. He finds that the
Question 8 options:
|
|
Hunter can be 95% confident that the mean age of all presidents is 55 years. |
|
|
95% of all the ages of the presidents lie between 55 ± 1.98. |
|
|
Hunter should have taken a larger sample to reduce the margin of error. |
|
|
Hunter is 95% confident that the mean age of all presidents lies between 53.02 and 56.98 years. |
|
|
The confidence interval makes no sense since Hunter has the entire population of ages. |
The 95% confidence interval for the mean age of all men who have been president is 55±1.98.
Step by step
Solved in 2 steps with 1 images
