4MA1/1F Jun 2023, Question 17: Estimating the Mean for Grouped Data
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 3 marks
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The question, in short
Using the grouped frequency table for Abby's daily walking minutes in September, estimate the total number of minutes she walked that month.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 3 marks
- 1Use the midpoint of each group: 15, 45, 75, 105, 135
- 2Multiply by frequency: 15 × 5 = 75, 45 × 6 = 270, 75 × 8 = 600
- 3105 × 9 = 945, 135 × 2 = 270
- 4Total: 75 + 270 + 600 + 945 + 270 = 2160
Answer2160
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