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A-level Mathematics - Statistics Definitions (Edexcel) Questions All Solved.

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Population - Answer The whole set of items that are of interest Census - Answer Observes or measures every member of a population Sample - Answer Selection of observations taken from a subset of the population Sampling unit - Answer An individual item of a population Sampling frame - Answer A unique numbering or naming of sampling units to form a list Simple random sample - Answer Random sampling technique in which every member of the population has an equal chance of being selected Systematic sampling - Answer Random sampling technique in which elements are chosen at regular intervals from an ordered list Stratified sampling - Answer Random sampling technique in which the population is divided into mutually exclusive strata (classifications) and a random sample is chosen from each, maintaining the population's proportions lying within each strata Quota sampling - Answer Non-random sampling technique in which a sample is chosen by the researcher to represent the characteristics of the whole popu lation Opportunity (convenience) sampling - Answer Non-random sampling technique in which elements are selected based on availability at the time of sampling, chosen to fit required criteria.

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A-level Mathematics - Statistics
Definitions (Edexcel) Questions All
Solved.
Population - Answer The whole set of items that are of interest



Census - Answer Observes or measures every member of a population



Sample - Answer Selection of observations taken from a subset of the population



Sampling unit - Answer An individual item of a population



Sampling frame - Answer A unique numbering or naming of sampling units to form a list



Simple random sample - Answer Random sampling technique in which every member of the
population has an equal chance of being selected



Systematic sampling - Answer Random sampling technique in which elements are chosen at regular
intervals from an ordered list



Stratified sampling - Answer Random sampling technique in which the population is divided into
mutually exclusive strata (classifications) and a random sample is chosen from each, maintaining the
population's proportions lying within each strata



Quota sampling - Answer Non-random sampling technique in which a sample is chosen by the
researcher to represent the characteristics of the whole population



Opportunity (convenience) sampling - Answer Non-random sampling technique in which elements are
selected based on availability at the time of sampling, chosen to fit required criteria.

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