Reliable results: arise from test being repeated
Accurate results: close as possible to the true value
Precise results: use smallest scale possible
Control variable: kept the same, don't affect results
Measured variable: dependent variable
Changed variable: independent variable
Control group: allows result comparison, don't do anything to it
Placebo: dummy drug to stop bias and psychological factors
Double-blind trial: stops bias, doctor and patients don't know if drug or placebo
Standard deviation: comparison about the mean
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