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Representations of Data

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Question 6

100 students completed a puzzle, their times are summarised by summary data and the box plot.

A horizontal box plot for puzzle completion times on a gridded axis from 0 to 14 minutes.

∑x=395∑x2=1740 \sum x = 395 \quad \sum x^2 = 1740 ∑x=395∑x2=1740
a.

Write down the range of the times.

[1]
b.

Write down the interquartile range of the times.

[1]
c.

Calculate the mean and the standard deviation of the times.

[3]
d.

State, giving a reason, whether you would recommend using the mean and standard deviation or the median and interquartile range to describe these data.

[2]
Markscheme

Representations of Data Questions

  1. A Level
  2. /Maths
  3. /Representations of Data

160 exam-style questions on Edexcel A Level Maths Representations of Data, covering 3.1 Outliers, 3.2 Box Plots, 3.3 Cumulative Frequency, 3.4 Histograms, and 3.5 Comparing Data. Each one has a worked solution and a mark scheme showing where the marks go.

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