GCSE Maths SB AQA H1 Ch 4:Layout 4
27/1/10
21:19
Page 115
Chapter
Statistics: Statistical representation 1 Line graphs
This chapter will show you … how to interpret and draw line graphs and stem-and-leaf diagrams
2 Stem-and-leaf
to
how to draw scatter diagrams and lines of best fit
to
how to interpret scatter diagrams and the different types of correlation
diagrams
3 Scatter diagrams
4 Cumulative
how to draw and interpret cumulative frequency diagrams to
how to draw and interpret box plots
Visual overview
frequency diagrams
Averages
Stem-and-leaf diagrams
Scatter diagrams
5 Box plots
Box plots
Cumulative frequency diagrams
What you should already know ● ● ● ●
How to plot coordinate points (KS3 level 4, GCSE grade F) How to read information from charts and tables (KS3 level 4, GCSE grade F) How to calculate the mean of a set of data from a frequency table (KS3 level 5, GCSE grade E) How to recognise a positive or negative gradient (KS3 level 6, GCSE grade D)
Quick check The table shows the numbers of children in 10 classes in a primary school. Calculate the mean number of children in each class. Number of children Frequency
27 1
28 2
29 4
30 2
31 1
UNIT 1 115