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controlled experiment
experimental investigation of the relationship between one or more independent variables and a dependent variable, while all other variables are controlled.
independent variable
variable that is being manipulated
dependent variable
variable that is being measured
experimental groups
group that is exposed to the independent variable and receives the experimental treatment
control groups
group that forms a baseline level to compare the experimental group with the control group
population
wider group of people the study is investigating
sample size
smaller group of people selected from the population who will be participants in the study
quantitative data
data that includes measurable values and quantities and can be compared on a numerical scale