In this lesson, we will discuss the difference between a sample and a census, and how to avoid bias in sampling.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
In order to test what Arsenal fans think about their manager, a student gives an online questionnaire to 100 Arsenal fans. The student is testing his hypothesis by taking a ….
Census
Population
Quantitative
Correct answer: Sample
Sample
Q2.
Which of the following is a potential disadvantage of a sample?
Correct answer: May be biased if the sample is unfair or too small
May be biased if the sample is unfair or too small
May be less biased than a census
More expensive than taking a census
More time-consuming than taking a census
Q3.
Mr Millar wants to test whether people prefer reading books to watching TV by asking 300 people outside Waterstones (a book shop chain) on a Friday morning. What is the most likely reason that this sample will be biased?
He asks people on a Friday, rather than another day or the week
He doesn't necessarily ask the same number of men and women
Correct answer: People who shop at Waterstones are more likely to prefer reading books
People who shop at Waterstones are more likely to prefer reading books