# Mathematical Requirements

Some of the mathematical requirements on page 58 of the specification may need more detail to explain the level expected. We are providing notes here.

- use ratios
- use and calculate percentages
- interpret frequency tables and diagrams, bar charts and histograms
- understand simple probability
- understand the principles of sampling as applied to scientific data

[2]Note on sampling (32 KB) [3]

Note on sampling (10 KB) [4]

- understand the terms mean, median and modeuse a scatter diagram to show a correlation between variables
- understand the meaning of simple measures of correlation
- understand the meaning of simple measures of significance

[2]Note on significance (34 KB) [5]

Note on significance (16 KB) [6]

- translate information between graphical and numerical forms
- sketch a graph indicating the relationship between two variables.