Frequency polygons. Score 1 to to to to to 50

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Presentation transcript:

Frequency polygons. Score 1 to 10 11 to 20 21 to 30 31 to 40 41 to 50 Frequency polygons are used to show how a set of data is distributed (the shape of the data). They can be used to compare two sets of data. Example: The table shows the scores of year 11 students in a Geography test. Score 1 to 10 11 to 20 21 to 30 31 to 40 41 to 50 Frequency 4 8 16 20 12 Mid -point Mid -point 5.5 15.5 25.5 35.5 45.5

Score 1 to 10 11 to 20 21 to 30 31 to 40 41 to 50 Frequency 4 8 16 20 12 Mid -pt 5.5 15.5 25.5 35.5 45.5

Score 1 to 10 11 to 20 21 to 30 31 to 40 41 to 50 Frequency 4 8 16 20 12 Mid -pt 5.5 15.5 25.5 35.5 45.5