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2 marksMeasures of Central Tendency

CSEC Mathematics · 2021 · Paper 2 · Question 5(a)(i)b)

One hundred students were surveyed on the amount of money they spent on data for their cellphones during a week. The table shows the results as well as the midpoint for each class interval.

Calculate an estimate of the mean amount of money spent, giving your answer correct to 2 decimal places.

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

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Other parts of this question

  1. 5(a)(i)a)Using the table, determine the modal class of the amount of money spent.[1 mark]
  2. 5(a)(ii)Damion reports that the median amount spent is $84. Briefly explain why Damion's report could be correct.[1 mark]
  3. 5(b)(i)Complete the table by inserting the missing values.[2 marks]
  4. 5(b)(ii)A student is selected at random. What is the probability that he/she was being driven to school on that day?[1 mark]
  5. 5(b)(iii)One of the girls is selected at random. What is the probability that she did NOT cycle to school?[2 marks]

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