The frequency table shows the time, in minutes, spent by students on a homework assignment.
a.
[1]
Complete the cumulative frequency table
| Time (t t\,t min) | Cumulative Frequency |
|---|---|
| 0<t≤200 < t \leq 200<t≤20 | |
| 0<t≤400 < t \leq 400<t≤40 | |
| 0<t≤600 < t \leq 600<t≤60 | |
| 0<t≤800 < t \leq 800<t≤80 | |
| 0<t≤1000 < t \leq 1000<t≤100 | |
| 0<t≤1200 < t \leq 1200<t≤120 |
b.[2]
On the grid opposite draw a cumulative frequency graph for this information.
c.[2]
Use your cumulative frequency graph to find an estimate for the interquartile range.
Cumulative Frequency Questions
Practise OCR GCSE Maths Cumulative Frequency with exam-style questions for Foundation and Higher tier. 24 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.