A geneticist took a large sample of adults and measured their heights. Summary statistics for the heights of the men and women in the study are shown in the table below.
Suppose that we choose a random man and a random woman from the study and look at the difference
between their heights. We can assume that their heights are independent. Let M represent the man's
height, W represent the woman's height, and D represent the difference between their heights
(D = M - W).
Mean
Standard deviation
Men
HM = 175 cm
OM = 8 cm
Women
HW = 162 cm
OW = 7 cm
Find the standard deviation of D.
Choose 1
1 centimeters
15 centimeters