4MA1/1F Jan 2023, Question 16: Estimating the Mean for Grouped Data
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 4 marks
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The question, in short
Using a grouped frequency table of dancing times for 80 students across five class intervals, calculate an estimated mean length of time spent dancing.
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Solution · 4 marks
- 16 × 11 = 66
- 218 × 25 = 450
- 330 × 23 = 690
- 442 × 15 = 630
- 554 × 6 = 324
- 666 + 450 + 690 + 630 + 324 = 2160
- 72160 ÷ 80 = 27
Answer27
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