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Date May 2009 Marks available 1 Reference code 09M.2.sl.TZ2.1
Level SL only Paper 2 Time zone TZ2
Command term Write down Question number 1 Adapted from N/A

Question

The following diagram is a box and whisker plot for a set of data.


The interquartile range is 20 and the range is 40.

Write down the median value.

[1]
a.

Find the value of

(i)     \(a\) ;

(ii)    \(b\) .

[4]
b.

Markscheme

18     A1     N1

[1 mark]

a.

(i) 10     A2      N2

(ii) 44     A2      N2

[4 marks]

b.

Examiners report

Most candidates were able to find the values for the median, lower quartile, and point b. A large majority answered this question correctly.

a.

Most candidates were able to find the values for the median, lower quartile, and point b. A large majority answered this question correctly.

b.

Syllabus sections

Topic 5 - Statistics and probability » 5.2 » Central tendency: mean, median, mode.
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