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1 markStatistical Inferences

CSEC Mathematics · January 2009 · Paper 2 · Question 7(b)(ii)

What assumption have you made in drawing your curve through the point (0,0)?

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Other parts of this question

  1. 7(a)Copy and complete the table to show the cumulative frequency for the distribution.[2 marks]
  2. 7(b)(i)Using a scale of 1 cm to represent 5 marks on the horizontal axis and 1 cm to represent 5 students on the vertical axis, draw the cumulative frequency curve…[5 marks]
  3. 7(c)Use your graph to determine the number of students who passed the test.[2 marks]
  4. 7(d)What is the probability that a student chosen at random had a mark less than or equal to 30?[2 marks]

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