A population is a collection of individual people or items. A population may be of finite size if you can count how many of them there are, or of infinite size if it is impossible to know exactly how many members there are in the population.
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What is a census?
A census is when information is obtained from all members of the population.
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Advantages of a census.
Every single member of the population is used. The investigation is unbiased. You obtain an accurate answer in the end.
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Disadvantages of a census.
Obtaining information from each member of the population takes a long time to do. It is costly. It is often difficult to ensure that the whole population is surveyed.
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What is a sample?
A sample is a selection of individual members or items from the population.
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What is a sample survey?
An investigation using a sample is called a sample survey.
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What is a sampling unit?
A sampling unit is an individual member of a population.
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What is a sampling frame?
A sampling frame is a list of sampling units used to represent a population.
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Other cards in this set
Card 2
Front
A census is when information is obtained from all members of the population.
Back
What is a census?
Card 3
Front
Every single member of the population is used. The investigation is unbiased. You obtain an accurate answer in the end.
Back
Card 4
Front
Obtaining information from each member of the population takes a long time to do. It is costly. It is often difficult to ensure that the whole population is surveyed.
Back
Card 5
Front
A sample is a selection of individual members or items from the population.
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