We have already seen that male students had a significantly bigger mean head circumference than female students (Week 4 Exercise: Head circumference) and also that, for females, head circumference and height were related (Week 7 Exercise: Head circumference and height). Could it be that the difference in head circumference between the sexes is explained by the difference in height?
The following graph shows a plot of head circumference against height for males and females:
1. What method could we use to answer the question: is the difference in head circumference between the sexes explained by the difference in height?
Check suggested answer 1.
Continue with exercise.
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