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Published byKristopher Pitts Modified over 8 years ago

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**Cumulative frequency Cumulative frequency graph**

Cumulative frequency table Cumulative frequency graph

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**Measuring the middle of a distribution**

The mean The mode The arithmetic average obtained by adding all the scores and dividing by the total number of scores The score which occurs most frequently

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**Middle of a distribution**

The median When placed in order from smallest to largest, the middle score

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**Find mean mode and median of…**

b) 13, 12, 15, 13, 18, 14, 16, 15, 15, 17

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**Percentiles In a cumulative frequency graph….**

The 25th percentile is called the lower quartile The 50th percentile is the middle value (median value) The 75th percentile is called the upper quartile

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**The interquartile range**

Interquartile range = upper quartile – lower quartile

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**Box and Whisker Plots A 5 figure visual display of a data set**

The minimum value The lower quartile The median The upper quartile The maximum value

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Box and whisker plots

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