Adam measures the height, h h\,h cm, of each of his 60 tomato plants. The results are summarised in the table below.
| Height (cm) | Frequency |
|---|---|
| 140<h≤150140 < h \le 150140<h≤150 | 7 |
| 150<h≤160150 < h \le 160150<h≤160 | 10 |
| 160<h≤170160 < h \le 170160<h≤170 | 15 |
| 170<h≤180170 < h \le 180170<h≤180 | 19 |
| 180<h≤200180 < h \le 200180<h≤200 | 9 |
Use linear interpolation to estimate the median height.
Estimate the mean height.
Estimate the standard deviation of the heights.
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.