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.
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.
