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CSEC Mathematics · Question 5(a)(iv)

A group of 100 students estimated the mass, m (grams), of a seed. A cumulative frequency curve shows the results.

Using the cumulative frequency curve, estimate the number of students whose estimate is 2.8 grams or less.

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Other parts of this question

  1. 5(a)(i)Using the cumulative frequency curve, estimate the median.[1 mark]
  2. 5(a)(ii)Using the cumulative frequency curve, estimate the upper quartile.[1 mark]
  3. 5(a)(iii)Using the cumulative frequency curve, estimate the semi-interquartile range.[2 marks]
  4. 5(b)(i)Use the cumulative frequency curve on page 18 to complete the frequency table below.[2 marks]
  5. 5(b)(ii)Find the probability that the student estimated the mass to be greater than 6 grams.[2 marks]

More practice: the rest of this paper · more Analysis of Statistical Diagrams questions · all CSEC Mathematics past papers