Data Set 6-1
the Correlation Between the Number of PhDs

Multiple Choice

Data Set 6-1
The correlation between the number of PhDs and the number of mules in a state used to be approximately -.90. Accept the following simplified summary data.
$\begin{array}{lll}& \underline{\text { PhDs}}& \underline{\text { Mules }}\\\text { Mean } & 40 & 200 \\\text { Standard Deviation } & 15 & 50\end{array}$
In questions based on Data Set 6-1, the task is to predict the number of mules for a state, given the number of PhDs.
-Look at Data Set 6-1. For a state with no PhDs the predicted number of mules is

A) 320
B) 80
C) 20
D) none of the other alternatives are correct.