Skip to content

Course home

Data Collection

Data Collection

EasyMedium
12345678910111213141516171819202122
Question 17

A wetland contains five different types of amphibian.
There are an estimated 280 Common Frogs, 200 Common Toads, 120 Smooth Newts, 80 Great Crested Newts and 120 Palmate Newts.
Priya wishes to investigate the health of the amphibians in the wetland.
She decides to take a sample of 80 amphibians.

a.

Give a reason why stratified random sampling cannot be used.

[1]
b.

Explain how a sample of size 80 could be taken to ensure that the estimated populations of each type of amphibian are fairly represented.

You should state the name of the sampling method used.

[2]
Markscheme

Data Collection Questions

  1. AS Level
  2. /Maths
  3. /Data Collection

23 exam-style questions on Edexcel AS Level Maths Data Collection, covering 1.1 Populations and Samples, 1.2 Sampling, 1.3 Non-Random Sampling, 1.4 Types of Data, and 1.5 The Large Data Set. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank