Higher November 2018 Paper 3 Q7
7 The table gives information about the speeds of 70 cars.
| Speed (\(s\) mph) | Frequency |
|---|---|
| \(0 \lt s \leqslant 10\) | 14 |
| \(10 \lt s \leqslant 20\) | 18 |
| \(20 \lt s \leqslant 30\) | 26 |
| \(30 \lt s \leqslant 40\) | 12 |
Draw a frequency polygon for this information. (2)
| Answer | Mark | Mark scheme |
|---|---|---|
| Diagram drawn | B2 | for correct frequency polygon |
| (B1 | for points plotted at correct midpoints of intervals or joining points at correct heights consistently within intervals including plotting at end values or correct frequency polygon with one point incorrect or correct frequency polygon with first and last points joined directly) |
Additional guidance
Plotting at (5,14), (15,18), (25,26), (35,12)
Must use line segments for B2
Joining must be with line segments
NB ignore any histogram drawn and any part of frequency polygon outside range of first and last points plotted