Examlex
Sources of polling error can include
Nondirectional Research Hypothesis
A research hypothesis that posits a difference between groups but not in either direction. See Directional Research Hypothesis.
Null Hypothesis
A hypothesis that there is no significant difference or effect, serving as the default assumption that is tested against.
Error Hypothesis
A statement positing the existence of a difference or effect, used in the context of hypothesis testing to denote a hypothesis that is tested for being in error relative to the null.
Larger Population
Refers to a bigger group or category of individuals from which samples can be drawn for statistical analysis.
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