Which Represents the Calculation for the Response Rate?
A) Completed $\frac{\sum(X-\bar{X})^{2}}{n-1}$

Which represents the calculation for the response rate?

A) Completed responses divided by the sampling frame minus nonresponse units and multiplied by 100.
B) $\frac{\sum(X-\bar{X}) ^{2}}{n-1}$
C) 100% divided by the response rate times the population (or sampling frame) .
D) All of them would provide the same answer.