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2.2 Data Presentation and Interpretation

2.2 Data Presentation and Interpretation

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Question 6

The following genuine counts are from the 2011 age-structure sheet of the OCR large data set.

Local AuthorityAll usual residentsAge 65–74Age 75–84Age 85–89Age 90 and over
County Durham513242508833063573213506
Darlington105564971761721740810
a.

Calculate the proportion aged 65 or over for each Local Authority.

[4]
b.

Calculate the proportion aged 65 or over in the two Local Authorities combined.

[2]
c.

Explain why the combined proportion is not the arithmetic mean of the answers to part (a).

[1]
Markscheme

2.2 Data Presentation and Interpretation Questions

  1. A Level
  2. /Maths
  3. /2.2 Data Presentation and Interpretation

121 exam-style questions on OCR A Level Maths 2.2 Data Presentation and Interpretation, covering 2.2.1 Tables and diagrams for single variable data, 2.2.2 Area in a histogram, 2.2.3 Scatter diagrams and regression lines, 2.2.4 Informal interpretation of correlation, 2.2.5 Correlation and causation, 2.2.6 Measures of average and spread, 2.2.7 Calculations of mean and standard deviation, 2.2.8 Outliers, 2.2.9 Selecting or critiquing data presentation, and 2.2.10 Cleaning data. Each one has a worked solution and a mark scheme showing where the marks go.

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