When there are a large number of values present, the data may be presented in a table. The pupils in year 6 at St Jude’s School were asked how many siblings they had. The results are displayed in the ...

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 the ...

To get the median, put all of the numbers in a set in increasing numerical order. Count how many numbers there are in each set. This is shown here: If the number of items in a set is even, divide it ...