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2 Unit AS 2: Applied Mathematics

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Question 150

A college wants to estimate the proportion of its students who travel by public transport. It has 640 full-time students and 160 part-time students.

One researcher proposes asking 80 volunteers. Another proposes selecting a stratified random sample of 80 students, using study mode as the stratum.

a.

Calculate the numbers of full-time and part-time students in the stratified sample.

[3]
b.

Explain two reasons why the stratified random sample is preferable to the volunteer sample.

[2]
c.

State why the result from the stratified sample is still an estimate rather than the exact population proportion.

[1]
Markscheme

2 Unit AS 2: Applied Mathematics Questions

  1. A Level
  2. /Maths
  3. /2 Unit AS 2: Applied Mathematics

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