When an Opinion Poll Says That "With 95 Percent Confidence

Multiple Choice

When an opinion poll says that "with 95 percent confidence," the margin of error for its results is plus or minus 3 percentage points, this means that:

A) 95 percent of the people chosen for the sample were contacted.
B) between 92 percent and 98 percent of the people chosen for the sample were contacted.
C) the percent of people who said Yes to the question was between 92 percent and 98 percent.
D) one can be certain that the true population value is within ± 3 points of 95 percent.
E) 95 percent of all samples chosen, as this one was, give results within ± 3 points of the true population value.