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Representations of Data

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Question 16

The partially completed box plot shows the distribution of average temperatures at Heathrow in 2015.

A partially completed horizontal box plot on graph paper with a numbered temperature axis from 7 to 29, showing a box and median line but no whiskers or outliers.

An outlier is defined as a value more than 1.5×IQR1.5 \times \text{IQR}1.5×IQR below Q1 Q_1\,Q1​ or more than 1.5×IQR1.5 \times \text{IQR}1.5×IQR above Q3Q_3Q3​. The lowest temperature was 9∘C9^\circ\text{C}9∘C and the highest two temperatures were 20∘C20^\circ\text{C}20∘C and 26∘C26^\circ\text{C}26∘C.

a.

Calculate the interquartile range.

[1]
b.

Complete the box plot showing clearly any outliers.

[3]
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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