If we compute a correlation on data that come only from the middle of the X distribution (restricted range)rather than from the entire range,the correlation is likely to be _____ the correlation from the entire range.
A)smaller than
B)the same as
C)a little larger than
D)a lot larger than

Question

Quizplus · Accepted Answer

When we compute a correlation on data that come only from the middle of the X distribution rather than from the entire range, we are essentially restricting the range of X values. This means that there will be less variability in the X variable, and therefore less variability to explain in the Y variable. As a result, the correlation is likely to be smaller than the correlation from the entire range where there is more variability in the X variable.

If We Compute a Correlation on Data That Come Only