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2 marksFrequency Tables

CSEC Mathematics · January 2016 · Paper 2 · Question 7(a)

A table shows the minutes taken by students to complete a science experiment, grouped into time intervals with corresponding frequencies and cumulative frequencies.

Complete the cumulative frequency column in the table.

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Other parts of this question

  1. 7(b)On the grid on page 23, using a scale of 2 cm to represent 5 minutes on the x-axis and 2 cm to represent 5 students on the y-axis, draw a cumulative frequency…[5 marks]
  2. 7(c)(i)Using the graph, estimate the median time taken to complete the experiment.[2 marks]
  3. 7(c)(ii)the probability that a student, chosen at random, took 30 minutes or less to complete the experiment.[2 marks]

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