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.
121 exam-style questions on OCR A Level Maths 2.2 Data Presentation and Interpretation, covering 2.2.1 Tables and diagrams for single variable data, 2.2.2 Area in a histogram, 2.2.3 Scatter diagrams and regression lines, 2.2.4 Informal interpretation of correlation, 2.2.5 Correlation and causation, 2.2.6 Measures of average and spread, 2.2.7 Calculations of mean and standard deviation, 2.2.8 Outliers, 2.2.9 Selecting or critiquing data presentation, and 2.2.10 Cleaning data. Each one has a worked solution and a mark scheme showing where the marks go.