In the following correlation matrix, skinfolds were taken at four sites in an attempt to estimate percent body fat (%fat). Which of the four skinfolds results in the LARGEST standard error of estimate for estimating %fat? $\begin{array}{|l|c|c|c|c|c|}
\hline & \text { \%fat } & \text { Chest } & \text { Abd } & \text { Calf } & \text { Back } \
\hline \text { \%fat } & 1.00 & & & & \
\hline \text { Chest } & .48 & 1.00 & & & \
\hline \text { Abd } & .50 & .62 & 1.00 & & \
\hline \text { Calf } & .58 & .26 & .11 & 1.00 & \
\hline \text { Back } & .62 & .23 & .34 & .42 & 1.00 \
\hline
\end{array}$
A) Chest
B) Abd
C) Calf
D) Back
E) It is impossible to determine from what is given.

Question

Quizplus · Accepted Answer

The standard error of estimate is inversely related to the correlation coefficient. The skinfold with the lowest correlation with %fat will have the largest standard error. The Chest skinfold has the lowest correlation (.48) with %fat.

In the Following Correlation Matrix, Skinfolds Were Taken at Four