Use the following information for questions:
Suppose that a 95% confidence interval for the proportion of first-year students at a school who played in intramural sports is 35% plus or minus 5%.
-The 95% confidence interval for the proportion of students playing intramural sports is
A) 25% to 45%
B) 30% to 35%
C) 35% to 40%
D) 30% to 40%

Question

Use the following information for questions:
 Suppose that a 95% confidence interval for the proportion of first-year students at a school who played in intramural sports is 35% plus or minus 5%.
-The 95% confidence interval for the proportion of students playing intramural sports is
A) 25% to 45%
B) 30% to 35%
C) 35% to 40%
D) 30% to 40%

Quizplus · Accepted Answer

The confidence interval is calculated as the estimated proportion (35%) plus or minus the margin of error (5%). Therefore, the interval is from 30% (35%-5%) to 40% (35%+5%).

Use the Following Information for Questions