The mean is the most commonly used measure of average. To find the mean of a list of numbers, add them all together and divide by how many numbers there are: \(\text{mean} = \frac{\text{sum of all ...

Analysing data - Edexcel In statistics there are three types of average: the mean, the median and the mode. Measures of spread such as the range and the interquartile range can be used to reach ...