1. You are supplied the following data about heights of students in a college.
|
Boys |
Girls |
|
|
Number |
72 |
38 |
|
Average Height(inches) |
68 |
61 |
|
Variance of distribution |
9 |
4 |
Find out:
(a). In which sex, boys or girls, is there greater variability in individual heights.
(b). Common average heights in boys and girls.
(c). Standard deviation of height of boys and girls taken together.
(d). Combined variability.
