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1 markStandard Deviation for Data Comparison

CSEC Mathematics · 2022 · Paper 2 · Question 5(b)

In Class B, the mean height of the students is 123.5 cm, and the standard deviation 29.87. For Class A, the standard deviation is 21.38.

Using the information provided, and your response in (a), comment on the distribution of the heights of the students in both Class A and Class B.

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Other parts of this question

  1. 5(a)Complete the table and use the information to calculate an estimate of the mean height of the students, giving your answer correct to 1 decimal place.[3 marks]
  2. 5(c)(i)Complete the cumulative frequency table below and use the information to construct the cumulative frequency curve on the grid provided on page 19.[1 mark]
  3. 5(c)(ii)a)Use your cumulative frequency curve to find an estimate of the median height of the group of students.[1 mark]
  4. 5(c)(ii)b)Use your cumulative frequency curve to find the probability that a student chosen at random would be taller than 130 cm.[1 mark]

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