A survey asks people if their primary news source is from television news shows. The resulting 95% confidence interval for the proportion of all Americans who say their primary news source is from television news shows is 4%. Consider these three propositions:
I. If they use a higher confidence level, they will have a larger margin of error.
II. If they take a larger sample size, they will have a smaller margin of error.
III. If they make the margin of error smaller, they will have a larger confidence level.
Which of the following is true?
a. I and II
b. I, II and III
c. I and I

Question

A survey asks people if their primary news source is from television news shows. The resulting 95% confidence interval for the proportion of all Americans who say their primary news source is from television news shows is 4%. Consider these three propositions:
I. If they use a higher confidence level, they will have a larger margin of error.
II. If they take a larger sample size, they will have a smaller margin of error.
III. If they make the margin of error smaller, they will have a larger confidence level.
Which of the following is true?
	 a. I and II	
	 b. I, II and III	
	 c. I and I

cherrilyn · Answer

d. I and III	
	 e. I only

cherrilyn · Answer

please help! it's statistics hw

kropot72 · Answer

A larger confidence interval will lead to a larger margin of error.
Increasing the sample size will reduce the margin of error.
If the margin of error is reduced then the confidence interval will get smaller.

Can you now choose the right answer?