Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p
-Margin of error: $0.01$; confidence level: $95 \%$; from a prior study, $\hat { \mathrm { p } }$ is estimated by the decimal equivalent of $69 \%$
A)8218
B)14,184
C)26,507
D)7396

Question

Quizplus · Accepted Answer

The correct answer is A.The margin of error is 0.01 and the confidence level is 95%, so the z-score is 1.96. The sample proportion is 0.69, so the confidence interval is:0.69 +/- 1.96 * 0.01 = 0.69 +/- 0.0196 = (0.6704, 0.7096)

Use the Given Degree of Confidence and Sample Data to Construct