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2 marksSources of Data

CAPE Applied Mathematics Unit 1 · 2009 · Paper 2 · Question 2(c)(i)

A supermarket employs 12 cashiers, 24 shop assistants, 8 porters, and 6 supervisors. 25 employees are to be transferred to a new supermarket.

Explain why a stratified random sample might be a better technique for choosing the 25 persons than using a simple random sample.

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Other parts of this question

  1. 2(a)(i)State the kind of diagram which could be used to BEST illustrate the heights of 100 pea trees.[1 mark]
  2. 2(a)(ii)State the kind of diagram which could be used to BEST illustrate the number of cars sold by each of 4 salesmen of a dealership in a week.[1 mark]
  3. 2(a)(iii)State the kind of diagram which could be used to BEST illustrate the percentage of sales made by 6 sales clerks in a business.[1 mark]
  4. 2(b)(i)Construct a frequency distribution table to show the data.[3 marks]
  5. 2(b)(ii)Using the graph sheet provided, draw a bar chart to show this information.[3 marks]
  6. 2(c)(ii)Use the method of stratified random sampling to select 25 employees to send to the new supermarket.[4 marks]

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