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Box Plots

Example A car park attendant makes a record every hour of the number of cars in the car park. 32 25 17 14 17 26 24 12 3 work out the median and quartiles for number of cars in the car park Draw a box plot to represent this data. Box Plots. Example

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Box Plots

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  1. Example A car park attendant makes a record every hour of the number of cars in the car park. 32 25 17 14 17 26 24 12 3 work out the median and quartiles for number of cars in the car park Draw a box plot to represent this data. Box Plots

  2. Example A gardening magazine sells seedlings of a plant through the post and claims that the average height of the plants after one years growth will be 85cm. A sample of 24 of the plants were measured after one year with the following results (in cm) a) Find the median height of the sample b) Find the Inter-quartile range for the sample c) Represent this sample on a box and whisker plot

  3. Example The table shows the heights of thirty boys, correct to the nearest centimetre. • a) Obtain the median height of these boys and their inter-quartile range • b) Represent these heights on a box plot

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