All else being equal, increasing the level of confidence desired will
A) tighten the confidence interval
B) decrease the margin of error
C) increase precision
D) increase the margin of error
E) increase the margin of error and tighten the confidence interval

Question

Quizplus · Accepted Answer

Increasing the level of confidence desired will cause an increase in the margin of error. This is because as we want to be more confident in our results, we need to include more data points in our analysis, which increases the variance in our sample mean. Therefore, the confidence interval also widens, indicating less precision in our estimation.

All Else Being Equal, Increasing the Level of Confidence Desired