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How to prepare data for a cumulative frequency curve from a frequency distribution, including calculating upper class boundaries and cumulative frequencies?
Mathematics
ScanSolve AI Answer
Step 1: Prepare data for the cumulative frequency curve.
First, calculate the upper class boundaries and the cumulative frequencies from the given frequency distribution.
| Marks (%) | Frequency (f) | Upper Class Boundary | Cumulative Frequency (cf) |
|---|---|---|---|
| 0-9 | 1 | 9.5 | 1 |
| 10-19 | 3 | 19.5 | 1 + 3 = 4 |
| 20-29 | 6 | 29.5 | 4 + 6 |
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