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CAIE A-Level Mathematics A2 5.1.5 And Use the Mean and Standard Questions

Practise calculating and interpreting estimated means and standard deviations from grouped data.

Syllabus
2028–2030
Course
Mathematics 9709
Level
A2

Exam points

  • calculate estimated means from grouped frequency data
  • calculate variance and standard deviation using summary statistics
  • interpret standard deviation and compare variability between data sets

CAIE A-Level Mathematics A2 5.1.5 And Use the Mean and Standard Questions question 1

[Maximum number: 3]

The times taken, in minutes, by 150 students to complete a puzzle are summarised in the table.

Table for Question CAIE A-Level Mathematics A2 5.1.5 And Use the Mean and Standard Questions question 1 — CAIE A-Level Mathematics A2

Calculate an estimate for the mean time for these students to complete the puzzle.

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