Working with charts, graphs and tables
Working with charts, graphs and tables

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

Free course

Working with charts, graphs and tables

6 Technical glossary

This glossary is intended to provide a basic explanation of how a number of common mathematical terms are used. Definitions can be very slippery and confusing, and at worst can replace one difficult term with a large number of other difficult terms. Therefore, where an easy definition is available it is provided here, where this has not been possible an example is used. If you require more detailed or complete definitions, you should refer to one of the very good mathematical dictionaries that are available, or to one or more books listed in Section 7.

Approximation: A numerical result given to a required level of accuracy, for example, to the nearest metre.

Average: The word ‘average’ is often used instead of the word ‘mean’ but it can have other interpretations so it is best to use the appropriate correct term; this is usually ‘mean’, but may be ‘median’ or ‘mode’ (see below).

Chart: Pictorial representation of data, e.g. piechart, bar chart.

Data: Items of numerical information, raw facts or statistics collected together for analysis.

Decimals: A way of expressing numbers using place value,

e.g.

Fractions: Parts of a whole number, e.g. , , etc.

Graph: A drawing which depicts the relationship between data or values.

Mean: A typical value of a set of data; which is equal to the sum of the values in the set divided by the number of values in the set.

Median: The middle point of a set of values arranged in ascending or descending order.

Mode: The most common value in a set of data.

Percentage: A proportion of a hundred parts, e.g. 75 per cent =

Ratio: A comparison of one quantity with another.

Scale: A series of marks at regular intervals on a line used for measuring, e.g. the divisions on the axis of a graph or the degree markings on a thermometer.

Value: A numerical amount.

Skip Your course resources
LDT_3

Take your learning further371

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses372.

If you are new to university level study, we offer two introductory routes to our qualifications. Find out Where to take your learning next?373 You could either choose to start with an Access courses374or an open box module, which allows you to count your previous learning towards an Open University qualification.

Not ready for University study then browse over 1000 free courses on OpenLearn375 and sign up to our newsletter376 to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus371