Homework SourseGiven the following table for grades on a test calculate mea
Given the following table for grades on a test, calculate mean and standard deviation.
| Score | Frequency |
| 95-100 | 4 |
| 85-90 | 12 |
| 75-80 | 45 |
| 65-70 | 22 |
| 55-60 | 15 |
| 45-50 | 7 |
| 35-40 | 3 |
| 25-30 | 8 |
| 15-25 | 1 |
Solution
check it
http://libweb.surrey.ac.uk/library/skills/Number%20Skills%20Leicester/page_50.htm
