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Data in everyday life

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Quality Quiz:Professor Cleary
Another quiz from Professor Cleary

Congratulations: "A" is correct!

You may recall three different types of non-probability samples, one of which is a quota sample.

Types of samples:

While a quota sample is not per se a bad way to sample, Quinn knows that one can build in bias with sampling methods, in order to seek out desired results. After all, quota samples are a kind of what is known as “non-probability sampling.”

Nonetheless, a quota sample is somewhat similar to the stratified sample method that we reviewed last month. The first step is to identify the strata and their proportions as they are represented in the population. Then a convenience sample is used to secure the required number of subjects from each stratum. An apt example of this is a survey of shoppers at a shopping mall, making certain that 70 percent of those surveyed are female.

Again, tricks can be played with quota sampling, so Russ T. Buckett may be given results that he really wants in order to demonstrate to M.T. Pott that the teacup is half full, rather than half empty.


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