Quelpr
3 marksData Analysis

CAPE Applied Mathematics Unit 1 · 2012 · Paper 2 · Question 2(b)(ii)b)

A sample of 32 persons was asked how many times they used their cell phones in the last hour.

Calculate the standard deviation of the number of times that persons used their cell phones.

This question uses a figure or table from the paper — you'll see it when you practise.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 2(a)(i)The 300 members of the sports club constitute a ________________________.[1 mark]
  2. 2(a)(ii)The conducting of a poll on all the club members is known as a _____________________.[1 mark]
  3. 2(a)(iii)The 25 members from which data were collected are known as a _____________________.[1 mark]
  4. 2(a)(iv)The average age, 24, of the 25 members is known as a _____________________.[1 mark]
  5. 2(a)(v)The average age, 31, of the entire club is known as a ________________________.[1 mark]
  6. 2(b)(i)a)Determine the mode of the distribution.[1 mark]
  7. 2(b)(i)b)Determine the median of the distribution.[1 mark]
  8. 2(b)(ii)a)Calculate the mean number of times that persons used their cell phones.[3 marks]
  9. 2(b)(iii)Describe the shape of the distribution.[1 mark]
  10. 2(c)(i)Use the graph to determine the number of walkers that took part in the race.[1 mark]
  11. 2(c)(ii)Use the graph to determine the number of walkers that took less than 25 minutes to complete the race.[2 marks]
  12. 2(c)(iii)Use the graph to determine the percentage of walkers that took longer than 55 minutes to complete the race.[2 marks]
  13. 2(c)(iv)Use the graph to determine an approximate value of the inter-quartile range of the times that walkers took to complete the race.[3 marks]
  14. 2(c)(v)Use the graph to determine the value of x for which 60 per cent of the walkers took more than x minutes to complete the race.[3 marks]

More practice: the rest of this paper · more Data Analysis questions · all CAPE Applied Mathematics Unit 1 past papers