Chapter 3.1, Problem 12E

To determine

To find: the most important difference between the sexes and explain whether the same pattern is followed for women and men

Answer to Problem 12E

Yes, the same overall pattern holds for women and men.

The only difference between the sexes is that there is one outlier in male data (upper right).

Explanation of Solution

Given:

  

The same overall pattern holds for women and men, because the red dots seem to lie in the continuation of the pattern of blue dots

The given graph shows a clear direction; the overall pattern for both women and men moves from lower left to upper right. That is both women and men with higher mass tend to have higher metabolic rate. This is a positive association between the two variables. The form of the relationship is linear. That is, the overall pattern follows a straight line from lower left to upper right. The relationship is moderately strong because the points don’t deviate greatly from line. The only difference between the sexes is that there is one outlier in male data (upper right), since it falls outside the overall pattern.