Sampling is used every day
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To predict voting intentions |
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To assist marketing strategies |
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To monitor the environment |
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To monitor health and safety |
For example, it is only in a General Election that every voter gets the chance to vote, yet the outcome is often surprisingly accurately predicted by opinion polls which typically ask less than 2000 people their voting intention.
How are samples chosen? How accurate are they in predicting the behaviour of the population? What can be done to improve their accuracy? What is a confidence interval confident about? These are some of the topics covered by 'Sampling and Estimation' and by the 'Sampling Methods' module.
