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.
244 exam-style questions on AQA A Level Maths 2.2 L: Data presentation and interpretation, covering 2.2.1 Single-variable data diagrams, 2.2.2 Scatter diagrams and correlation, 2.2.3 Central tendency, variation and standard deviation, 2.2.4 Outliers and cleaning data, and 2.2 L: Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.