The margin of error in a confidence interval is necessary to account for _________.

A) random sampling errors
B) undercoverage
C) nonresponse
D) design errors

Margin Error

The maximum expected difference between the true population parameter and a sample estimate of that parameter.

Confidence Interval

A range of values, derived from sample statistics, that is likely to contain the value of an unknown population parameter, often expressed in terms of a percentage indicating the degree of confidence.

Random Sampling Errors

Variability in sample statistics from sample to sample due to the method of choosing a random subset of the population.