With all hypothesis tests, the sample is the only source of current information about the population.

Question

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Hypothesis tests are conducted using sample data to make inferences about the population parameters. This is because it is usually impractical or impossible to obtain information about the entire population, and the sample is the best representation of the population that is available. Therefore, the sample is the only current source of information about the population when conducting hypothesis tests.

With All Hypothesis Tests, the Sample Is the Only Source