Pie charts and frequency diagrams
Once you have collected your raw data, you need to represent it in a diagram. Two ways of doing this are to use a pie chart or frequency diagram.
In a survey, 100 school students were asked to name their favourite soap opera. The results are shown in a pie chart and a frequency diagram below.
In another school, Emmerdale was the most popular soap:
Remember: the larger the number, the larger the angle in the pie chart.
A pictogram uses symbols to represent frequency.
This pictogram shows the favourite comedy game show from a survey of 60 students.
|Have I Got News for You|
|Mock The Week|
= 4 people
For the show Have I Got News for You, 3 smiley faces mean this is the favourite for 12 students, as 3 x 4 = 12.
For QI there are 31/2 smiley faces. 1/2 is equal to 2 students, so in total 14 students rate QI as their favourite.