We can reduce the margin of error in an interval estimate of p by doing any of the following except
A) increasing the sample size.
B) increasing the planning value p* to .5.
C) increasing α.
D) reducing the confidence coefficient.

Question

We can reduce the margin of error in an interval estimate of p by doing any of the following except​
A) ​increasing the sample size.
B) ​increasing the planning value p* to .5.
C) ​increasing α.
D) ​reducing the confidence coefficient.

Quizplus · Accepted Answer

Increasing the planning value p* to .5 actually increases the margin of error because it maximizes the standard error, rather than reducing it.

We Can Reduce the Margin of Error in an Interval