How is the female midparental height calculated?

• A. Father's height + Mother's height
• B. Father's height - 13cm averaged with Mother's height
• C. Mother's height - 13cm averaged with Father's height
• D. Mother's height + 13cm averaged with Father's height

Answer: (B)

The midparental height for a female is calculated by taking the average of the father's height and the mother's height, adjusting the father's height by subtracting 13 cm. This adjustment accounts for the average height difference between males and females, providing a more accurate estimation of a daughter's potential adult height.

The formula used is:

(Father’s height - 13 cm + Mother’s height) / 2.

This results in a figure that reflects both parental heights while considering the typical gender differences in height. By subtracting 13 cm from the father's height, the calculation aims to balance the averages related to expected differences between male and female height in the population, thereby yielding a more precise prediction for the child's height.