Average and spread
Median The median is the middle value in a data set. Jade’s teacher has written the test scores in order from smallest to largest.
11 12 13 13 13 14 15 15 15 16 17 17 17 17 18 18 18 19 20 20
In this case there are two middle values. The median is midway between these two values. 16 .5 16 17 The median is 16.5 Exactly half the class scored more than 16.5 and exactly half the class scored less than 16.5 Mode The mode is the value that has the highest frequency.
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4 people scored 17. It has the highest frequency. The mode is 17.
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