Class Interval Frequency 60 - 64 2 65 - 69 3 70 - 74 6 75 - 79 11 80 - 84 8 85 - 89 7 90 - 94 2 95 - 99 1 The table shows the distribution of marks scored b...
Question 1 Report
| Class Interval |
Frequency |
| 60 - 64 | 2 |
| 65 - 69 | 3 |
| 70 - 74 | 6 |
| 75 - 79 | 11 |
| 80 - 84 | 8 |
| 85 - 89 | 7 |
| 90 - 94 | 2 |
| 95 - 99 | 1 |
The table shows the distribution of marks scored by students in an examination. Calculate, correct to 2 decimal places, the
(a) mean ; (b) standard deviation of the distribution.
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