Quartiles are the values that divide a data set into quarters: Put the values in order Divide the list into four equal parts The Quartiles are at the divisions The interquartile range shows the range ...
Sampling data - Intermediate & Higher tier - WJEC Averages and range - WJEC Range and box-and-whisker plots - WJEC Discussing results - WJEC Mean, median and mode ...
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