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CAIE A-Level Mathematics 5.1.5 Mean and Standard Deviation

Practise calculating mean and standard deviation from raw, grouped, coded or combined data, using frequency midpoints and supplied sums while preserving sufficient accuracy.

Syllabus
2028–2030
Course
Mathematics 9709
Level
A2

Exam points

  • use class midpoints with frequencies to estimate the mean and standard deviation for grouped data
  • substitute supplied sums into the variance formula before taking the non-negative square root
  • combine or decode sample totals before calculating statistics for the full transformed data set

5.1.5—And use the mean and standard question 1

[Maximum number: 3]

The heights, in cm, of the 11 basketball players in each of two clubs, the Amazons and the Giants, are shown below.

Table for Question 5.1.5—And use the mean and standard question 1 — CAIE A-Level Mathematics A2

Find the height of the fourth new player.

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