Examlex
Selection bias occurs more frequently in systematic samples than in simple random samples.
Gas Mileage
A measure of how many miles a vehicle can travel on a gallon of fuel.
Type I Error
An error that occurs in hypothesis testing when a true null hypothesis is incorrectly rejected.
Type II Error
Occurs when a false null hypothesis is not rejected, meaning a real effect or difference is missed in a study or test.
Null Hypothesis
A default hypothesis that there is no significant difference or effect, typically to be tested against an alternative hypothesis.
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