GCSE Edexcel Analysing data - Edexcel Averages from a grouped table In statistics there are three types of average: the mean, the median and the mode. Measures of spread such as the range and the ...

To find the median, add up the frequency column to find how many trains there were in total. There were 44 trains in total in this grouped frequency table, so work out 44 + 1 2 = 45 2 = 22.5.