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Specializing and trading makes us dependent on others.
Population Variances
A measure of the dispersion of all the values in a population, reflecting how much the individuals within the population differ from the population mean.
Equal Variances
An assumption in certain statistical tests that the variance within each of the groups or samples is the same across all groups or samples.
Random Samples
Samples chosen in such a way that each member of the population has an equal chance of being included.
Two-tailed Test
A two-tailed test is a statistical test in which the area of interest is in both tails of the probability distribution, allowing for the testing of both directions of an effect.
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