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June 2010 p61 q2
2376
The numbers of people travelling on a certain bus at different times of the day are as follows.
17, 5, 2, 23, 16, 31, 8, 22, 14, 25, 35, 17, 27, 12, 6, 23, 19, 21, 23, 8, 26
(i) Draw a stem-and-leaf diagram to illustrate the information given above. [3]
(ii) Find the median, the lower quartile, the upper quartile and the interquartile range. [3]
(iii) State, in this case, which of the median and mode is preferable as a measure of central tendency, and why. [1]
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