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Box Plots

In this worksheet, students practise reading and constructing box plots.

'Box Plots' worksheet

Key stage:  KS 4

GCSE Subjects:   Maths

GCSE Boards:   AQA, Eduqas, Pearson Edexcel, OCR,

Curriculum topic:   Statistics

Curriculum subtopic:   Statistics Interpreting and Representing Data

Difficulty level:  

Worksheet Overview

One of the diagrams you will have come across at this point is the cumulative frequency diagram.

When you are dealing with cumulative frequency, you are expected to be able to find the median and IQR.

You need to think about why you find these, why do we find averages and measures of spread? The answer is that we find these so we can compare distributions.

To do these comparisons from cumulative frequency diagrams, we use box plots (also sometimes called box and whisker diagrams).

 

What is a box plot.

A box plot is a diagram that allows us to make a visual comparison of the median, quartiles and min/max values for a distribution.

 

 

Where do we get the values from?

There are two ways you can get the information, the first is that you could be told the numbers and asked to draw a plot,

The second way would be for you to get a cumulative frequency graph and be asked to draw a box plot.

If any of the information cannot be read from the graph (this is sometimes the case for the highest/lowest), you will be told them in the question.

 

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