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Question 432

A wildlife charity wants to estimate the proportion of nesting boxes in a region that are occupied. Boxes are grouped into 24 woodland sites. The charity can inspect 120 of the 960 boxes.

a.

Describe a stratified random sample using woodland site as the stratum.

[2]
b.

Describe a cluster sample for the same investigation.

[1]
c.

Give one reason for preferring each method in this context.

[2]
Markscheme

2 Statistics Questions

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

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