Confidence intervals can be used to determine whether different sample proportions reflect a "real" difference in the population. The basic approach is to
A)find the margin of error for each proportion and see if the difference is less than zero.
B)find the difference in the proportions and see if the difference is less than zero.
C)find a confidence interval at the significance level desired for the difference in proportions.
D)find the difference in the proportions and see if the difference is greater than zero.

Question

Quizplus · Accepted Answer

The correct approach is to find a confidence interval at the significance level desired for the difference in proportions. This allows for determining if the observed difference in sample proportions likely reflects a true difference in the population proportions, by checking if the interval includes zero or not.

Confidence Intervals Can Be Used to Determine Whether Different Sample