Learn about calculating averages from grouped data with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

The mode is a statistical term for the value that occurs most frequently in a set of numbers. Learn about the difference between the mean, median, and mode.

1. Mean The mean is calculated by adding up all the values in a data set and dividing this total by the number of values.

Variance is a measurement of the spread between numbers in a data set. The variance measures how far each number in the set is from the mean. You can use Microsoft Excel to calculate the variance ...