AQA STATISTICS 1 REVISION NOTES - Mathsbox
AVERAGES AND MEASURES OF SPREAD • Mode : the most common or most popular data value the only average that can be used for qualitative data not suitable if the data values are very varied • Mean : important as it uses all the data values Disadvantage – affected by extreme values • Median : the middle value when the data are in order For n data values the median is the n + 1th value
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