Sheppard’s Correction for Moments | ML
Prerequisite:
grouping error
Sheppard’s Correction for grouping error
‘c’
Raw Moments
Central Moments
What Kind of data can be corrected?
- This method of correction to moments is only possible for the continuous variables i.e. the continuous data.
- The width of the class interval should be equal.
- Frequencies should be symmetrical. Frequency should taper off to zero in both directions.
| Marks | Number of Students |
|---|---|
| 0 – 10 | 1 |
| 10 – 20 | 6 |
| 20 – 30 | 11 |
| 30 – 40 | 17 |
| 40 – 50 | 21 |
| 50 – 60 | 16 |
| 60 – 70 | 13 |
| 70 – 80 | 7 |
| 80 – 90 | 5 |
| 90 – 100 | 2 |
Raw Moments –
Raw Moment
Sheppard’s correction for Raw Moments –
Sheppard’s Correction
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