Statistics - Data Collection Terms

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Key terms and defintions for data collection in statistics.

10 Terms

1

Population

The whole set of items that are of interest.

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2

Census

Observes or measures every member of a population.

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3

Sample

A selection of observations taken from the population.

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4

Sampling Unit

An individual unit of a population.

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5

Sampling Frame

A list of sampling units.

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6

Simple Random Sampling

Every sampling unit has an equal chance of being selected.

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7

Systematic Sampling

Each sampling unit are chosen at regular intervals in an ordered list.

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8

Stratified Sampling

Population divided into mutually exclusive strata and simple random sampling carried out in each strata.

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9

Quota Sampling

An interviewer or researcher selects a sample that reflects the characteristics of the whole population.

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10

Opportunity Sampling

Sample taken from people who are available at time of study who meet the criteria.

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