When Independent Samples with Unknown but Equal Standard Deviations Are

question 42

Short Answer

When independent samples with unknown but equal standard deviations are used to test for differences in the means, we pool the sample _________________.

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Definitions:

Test Statistic

A calculated value used in statistical hypothesis testing to determine whether to reject the null hypothesis, based on the difference between observed data and what is expected under the null hypothesis.

Alternative Hypothesis

The hypothesis that proposes a difference or effect, in contrast to the null hypothesis, which suggests no effect.

Population Distribution

The distribution of a variable across all members of a population.

Null Hypothesis

A statement of no difference or effect, used as the default assumption in hypothesis testing.