The margin of error ________ (increases or decreases) with an increased sample size and ________ (increases or decreases) with an increase in confidence level.
A) increases; decreases
B) decreases; decreases
C) decreases; increases
D) increases; increases

Question

Quizplus · Accepted Answer

The margin of error decreases with an increased sample size, as a larger sample size provides a more accurate representation of the population. However, the margin of error increases with an increase in confidence level, as a higher confidence level requires a wider interval estimation. Therefore, choice C is correct as it correctly identifies how the margin of error changes with both sample size and confidence level.

The Margin of Error ________ (Increases or Decreases) with an Increased