What is an example of a problem in which the sample data is likely to be paired?
A) the difference between the means of appraised and sales house prices
B) the difference between the proportion of defective items from two suppliers
C) the difference in the mean life of two major brands of batteries
D) the difference in the mean salaries for graduates in two different academic fields at a university
E) none of these choices

Question

Quizplus · Accepted Answer

Paired data is used when the same subjects are measured twice under different conditions. In option A, each house has both an appraised and a sales price, making the data naturally paired.

What Is an Example of a Problem in Which the Sample