Use the following information for questions:
In a survey of n = 950 randomly selected individuals, 17% answered yes to the question "Do you think the use of marijuana should be made legal or not?"
-A 90% confidence interval for the proportion of all Americans in favor of legalizing marijuana is
A) 0.150 to 0.190
B) 0.146 to 0.194
C) 0.142 to 0.198
D) 0.139 to 0.201

Question

Use the following information for questions:
 In a survey of n = 950 randomly selected individuals, 17% answered yes to the question "Do you think the use of marijuana should be made legal or not?"
-A 90% confidence interval for the proportion of all Americans in favor of legalizing marijuana is
A) 0.150 to 0.190
B) 0.146 to 0.194
C) 0.142 to 0.198
D) 0.139 to 0.201

Quizplus · Accepted Answer

The correct answer is A because the 90% confidence interval for the proportion of all Americans in favor of legalizing marijuana is 0.150 to 0.190. This is calculated using the formula: sample proportion +/- 1.645 * sqrt((sample proportion * (1 - sample proportion)) / sample size).

Use the Following Information for Questions