Revision list:

 Mean, median, mode, range, modal class for grouped data,  reverse mean questions

Stem and leaf diagrams, using them to find median and quartiles

Box and whisker diagrams

 Cumulative frequency, cumulative frequency curves and using them to find the median and lower and upper quartiles, interquartile range

Scatter graphs and correlation, line of best fit

Calculating mean from a table of discrete data

Estimated mean from a table of grouped data

NOTE: There will be nothing on sampling in the test

Good luck!