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Work through the activities on descriptive statistics (p.1-6).  They should mostly be relatively straightforward, although you may wish to support each other with some of the more complex calculations (e.g. interquartile range and standard deviation).

Don't go on to the inferential statistics (p.7 onwards) - if you finish early then you can do some additional preparation for the CSMP end of unit test (assuming it wasn't yesterday).