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variable
something that holds values
data
value the variables take on
qualitative data
qualities, non-numerical categories
quantitative data
represents counts or measurements
population
all subjects in a study
sample
subjects selected from the population
population parameters
numbers or observations that describe something about the population
sample statistics
numbers or observations that describe something about the sample
representative sample
relevant characteristics of sample members that match those of the population
simple random sample
selecting sample elements randomly; every element in the population has an equal chance of being selected for the sample