Adam is measuring the heights in cm of his tomato plants.
| Height (cm) | Frequency |
|---|---|
| 140<h≤150140 < h \leq 150140<h≤150 | 7 |
| 150<h≤160150 < h \leq 160150<h≤160 | 10 |
| 160<h≤170160 < h \leq 170160<h≤170 | 15 |
| 170<h≤180170 < h \leq 180170<h≤180 | 19 |
| 180<h≤200180 < h \leq 200180<h≤200 | 9 |
Use linear interpolation to estimate the median height.
Estimate the mean height.
Estimate the standard deviation.
4 exam-style questions on Edexcel A Level Maths 2.4 Variance and Standard Deviation. Each one has a worked solution and a mark scheme showing where the marks go.