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2 Statistics

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Question 44

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 Statistics Questions

  1. A Level
  2. /Maths
  3. /2 Statistics

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