The CO2 _2\,2 emissions, x x\,x g/km, of 250 cars are summarised in the table below.
| CO2 _2\,2 emission (g/km) | Frequency |
|---|---|
| 100≤x<140100 \le x < 140100≤x<140 | 30 |
| 140≤x<180140 \le x < 180140≤x<180 | 70 |
| 180≤x<220180 \le x < 220180≤x<220 | 90 |
| 220≤x<260220 \le x < 260220≤x<260 | 45 |
| 260≤x<300260 \le x < 300260≤x<300 | 15 |
Use linear interpolation to estimate the median CO2 _2\,2 emission.
Use linear interpolation to estimate the 30th percentile of the CO2 _2\,2 emissions.
105 exam-style questions on WJEC A Level Maths 2.2 Data presentation and interpretation, covering 2.2.1 Data presentation and interpretation, 2.2.2 Data presentation and interpretation, 2.2.3 Data presentation and interpretation, 2.2.4 Data presentation and interpretation, 2.2.5 Data presentation and interpretation, 2.2.6 Data presentation and interpretation, 2.2.7 Data presentation and interpretation, 2.2.8 Data presentation and interpretation, and 2.2 Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.