4MA1/2FR Jan 2020, Question 16: Estimating the Mean for Grouped Data
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2FR (Foundation) · Calculator · 3 marks
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The question, in short
Using the grouped frequency table of weekly grocery spending in 2019, estimate the total amount Fiona spent across the year.
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Solution · 3 marks
- 1Use the midpoint of each class: 10, 30, 50, 70, 90
- 2Midpoint × frequency: 50, 330, 400, 1330, 810
- 3Total = 50 + 330 + 400 + 1330 + 810 = 2920
Answer2920
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