Examlex
________ observations are supported by factual information,while ________ observations involve personal judgment.
Null Hypothesis
The default hypothesis that there is no effect or no difference, tested against an alternative hypothesis in statistical analysis.
Random Samples
Selections made in such a way that each member of a population has an equal chance of being included, ensuring the sample's representativeness of the whole.
F-test
A statistical test used to compare the variances of two samples to determine if they come from populations with equal variances.
Population Variances
A measure of the variability or spread of a population's data points, representing the average of the squared deviations from the mean.
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