Examlex
The earliest vertebrates had (lacked) jaws.
T-test for Dependent Means
A statistical test used to compare the means of two related groups.
Alternative Hypothesis
A statement proposing a relationship between variables, differing from the null hypothesis, and is tested for possible acceptance.
µ
The symbol for the mean (average) of a population in statistics.
Null Hypothesis
A statement in statistical testing that assumes there is no significant difference between specified populations, any observed difference being due to sampling or experimental error.
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