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2 marksFrequency Tables

CSEC Mathematics · May/June 2009 · Paper 2 · Question 7(a)

A table shows the waiting time (to the nearest minute) for 80 students at a school's canteen, with columns for Waiting Time, No. of Students, and Cumulative Frequency.

Copy and complete the table, showing the cumulative frequency.

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Other parts of this question

  1. 7(b)On the answer sheet provided, use the values from your table to complete the cumulative frequency curve.[4 marks]
  2. 7(c)(i)Use your graph from (b) above to estimate the median for the data.[2 marks]
  3. 7(c)(ii)Use your graph from (b) above to estimate the number of students who waited for no more than 29 minutes.[2 marks]
  4. 7(c)(iii)Use your graph from (b) above to estimate the probability that a student, chosen at random from the group, waited for no more than 17 minutes.[2 marks]

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