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Question
The following is a frequency distribution of grades for a statistics examination.| Examination Grade | Frequency |
| 40 - 49 | 3 |
| 50 - 59 | 5 |
| 60 - 69 | 11 |
| 70 - 79 | 22 |
| 80 - 89 | 15 |
| 90 - 99 | 6 |
Treating these data as a sample, compute the following:
a. The mean
b. The standard deviation
c. The variance
d. The coefficient of variation
Answer
This answer is hidden. It contains 33 characters.
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