If a public opinion survey reports finding that a particular candidate is supported by 60 percent
Of voters and that there is a 95 percent chance that support for this candidate is somewhere
Between 63.1 percent and 56.9 percent,the 3.1 percent variation from 60 percent is called

A) the selection bias.
B) the margin of error.
C) the standard deviation.
D) the sampling distribution of the mean.

The 3.1 percent variation from 60 percent is known as the margin of error in public opinion surveys. It represents the degree of uncertainty or sampling error in the results and is usually reported along with the estimated percentage of support. The margin of error is affected by factors such as sample size, sampling design, and survey methodology, and it indicates the range of values within which the true population parameter is likely to lie with a certain level of confidence. In this case, the survey suggests that there is a 95 percent chance that support for the candidate falls between 56.9 percent and 63.1 percent, which is within the margin of error of 3.1 percent.