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Date May 2008 Marks available 4 Reference code 08M.1.sl.TZ1.4
Level SL only Paper 1 Time zone TZ1
Command term Complete Question number 4 Adapted from N/A

Question

Complete the following table of values for the height and weight of seven students.

Markscheme

Mode=171     (A1)

Median 148151158163171171184

=163     (A1)

Mean=64.7     (A1)

Standard deviation=13.3     (A1)     (C4)

Note: If both mean and standard deviation given to 2 significant figures
Mean 65, (A0)(AP)
Standard deviation 13 (A1)(ft) ((AP) already deducted).

[4 marks]

Examiners report

Part (a) was well answered, albeit with some choosing the wrong value (14.3) for the standard deviation. The majority of candidates had the correct stem and leaf plot, though many lost a mark through not including a key and a few used a single digit in the stem. Some tried to draw two stem and leaf plots for the heights and weights in part (a) without realizing that part (b) had the ages written above.

Syllabus sections

Topic 2 - Descriptive statistics » 2.5 » Measures of central tendency.
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