Examlex
Random changes in the frequency of alleles of a population because of chance events is known as natural selection.
Supermarket Chains
Large retail organizations operating multiple grocery stores under the same brand or ownership, offering a wide variety of food and household products.
Student T-Distribution
A probability distribution that arises in the estimation of means of a normally distributed population in situations where the sample size is small and the population standard deviation is unknown.
Matched Pairs Experiment
An experimental design in which participants are paired based on certain characteristics, and each pair receives both treatments in a random order to compare outcomes.
Paired Differences
The differences between each pair of observations on two variables, used in statistical analysis to compare two related samples.
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