An approximate 99% confidence interval for an unknown proportion p is of the form

± the margin of error.

Question

An approximate 99% confidence interval for an unknown proportion p is of the form ± the margin of error.

Quizplus · Accepted Answer

This is true, as the formula for a 99% confidence interval for a proportion is of the form p ± z*SE, where p is the sample proportion, z is the critical value from the standard normal distribution for a 99% confidence interval (which is approximately 2.576), and SE is the standard error of the proportion. The term "" in the given interval may represent the sample proportion and standard error, respectively.

An Approximate 99% Confidence Interval for an Unknown Proportion P