Mean, Standard Deviation and Boxplots

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Mean, Standard Deviation and Boxplots

• Statistics

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Examination Marks (2) The table in the next
slide shows the marks for pupils who sat exams
in different subjects. For each exam
calculate a) The mean and standard deviation.
b) Work out the quartiles and draw a boxplot to
represent each set of data.
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See the next slide
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All marks in the different exams are out of
20. Different numbers of pupils sat each of the
exams.
Sample Standard Deviation
where n is the sample size.