STATISTICS DEFINITIONS Flashcards
(16 cards)
sampling frame
a list of all the individual members of the population from which a sample will be selected
a list of all the individual members of the population from which a sample will be selected
sampling frame
sampling unit
an individual member of the population you are studying
an individual member of the population you are studying
sampling unit
mutually exclusive
when 2 events/sets have no overlap (particularly in a venn diagram)
when 2 events/sets have no overlap (particularly in a venn diagram)
mutually exclusive
quota sampling
sampling method: set a quota for a category (e.g. 30 asian women) then use opportunity sampling until quota is full. Does not require sampling frame
sampling method: set a quota for a category (like stratified sampling), then use opportunity sampling until quota is full. Does not require sampling frame
quota sampling
independent
when 2 events/sets have no effect on each other, for this P(AnB) = P(A)*P(B)
when 2 events/sets have no effect on each other, for this P(AnB) = P(A)*P(B)
independent
population
an entire group of people or items (e.g. all penguins in Antartica, all screws produced in a factory on Tuesday)
an entire group of people or items
population
census
when you collect information on every member of a population
when you collect information on every member of a population
census
sources of uncertainty
any factor that may affect whether the results are truly representative of the population, e.g. natural variation in sample, bias introduced in a sample
any factor that may affect whether the results are truly representative of the population, e.g. natural variation in sample, bias introduced in a sample
sources of uncertainty
