## Revision of Basic Mathematical Techniques

- Integers, fractions and decimals
- Order of operations – brackets
- Percentages and ratios – percentages, profits, proportions and ratios
- Roots and powers – powers, roots, rules for powers

## Equations and Graphs

- Formulae and equations – manipulating equalities, linear equations
- Graphs – linear equations and graphs, simultaneous equations, non-linear equations

## Data Presentation and Measurements of Location and Dispersion

- Data – data and information, quantitative and qualitative data, primary and secondary data, discrete and continuous data
- Data presentation – pictograms, tables, charts (bar charts, pie charts), frequency distributions, histograms, frequency polygons, ogives, scatter diagrams
- Averages – the arithmetic mean, the mode, the median
- Dispersion – the range quartiles and the semi-interquartile range

## Probability

- The concept and rules of probability
- Expected values
- Expectation and decision-making

## Frequency Distributions, the Normal Curve and Sampling

- Probability distributions
- The normal distribution
- The standard normal distribution

## Financial Mathematics

- Interest – simple interest, compound interest, inflation, changes in the rate of interest
- Savings and loans – regular savings, sinking funds, loans, mortgages

## Example Candidate Response Booklet

Example Candidate Response (ECR) Booklets are a source of crucial information for Centres and Candidates as they use real candidate responses. We ask Senior Examiners to comment on five or more responses in terms of why the mark was awarded with commentary about how to improve the answer (if necessary).