Which of the Following Is True About the Margin of Error

Which of the following is true about the margin of error for the most common types of surveys?

A) If the number of individuals in the sample were to be substantially increased, the margin of error would decrease.
B) If the number of individuals in the sample were to be substantially decreased, the margin of error would also decrease.
C) If the number of individuals in the sample were to be substantially increased, the margin of error would not change.
D) If the number of individuals in the sample were to be substantially decreased, the margin of error would not change.