Question: Find the standard deviation and coefficient of skewness for the following distribution.
| Variable | 0- | 5- | 10- | 15- | 20- | 25- | 30- | 30-40 |
| Frequency | 2 | 5 | 7 | 13 | 21 | 16 | 8 | 3 |
Solution:
As nothing is specified skewness should be computed by Karl Pearson’s method.
