Examlex
The proportion of total income received by a particular group is called the group's
Normal Distributions
A type of continuous probability distribution for a real-valued random variable that is symmetric and describes data that cluster around a mean.
Matched Pairs
An experimental design where each subject is paired with another subject that has similar characteristics, but one receives the treatment and the other does not.
Pooled Variance
A method to estimate the variance of two or more populations that assumes the populations have the same variance but different means.
Test Statistic
A value calculated from sample data during a hypothesis test that is used to determine the probability of observing the sampled data under the null hypothesis.
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