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1 markClass Features

CSEC Mathematics · May/June 2017 · Paper 2 · Question 7(a)(i)

A table shows speeds (in kmh⁻¹) and frequencies for 90 vehicles passing a checkpoint. The table includes a cumulative frequency column.

For the class interval 20-39, as written in the table above, complete the following sentences: The upper class limit is ___________.

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Other parts of this question

  1. 7(a)(ii)For the class interval 20-39, as written in the table above, complete the following sentences: The class width is ___________.[1 mark]
  2. 7(a)(iii)For the class interval 20-39, as written in the table above, complete the following sentences: Sixteen vehicles passed a checkpoint at no more than ___________…[1 mark]
  3. 7(b)Complete the table shown above by inserting the missing values for the cumulative frequency column.[2 marks]
  4. 7(c)On the grid provided on page 21, using a scale of 2 cm to represent 20 kmh⁻¹ on the x-axis, and 2 cm to represent 10 vehicles on the y-axis, draw the…[4 marks]
  5. 7(d)(i)On your graph, draw reference lines to estimate the speed at which no more than 50% of the vehicles drove as they passed the checkpoint.[1 mark]
  6. 7(d)(ii)What is the estimated speed?[1 mark]

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