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If the populations are normally distributed and the variances of the two populations are equal, it is appropriate to use the "pooled" formula to determine the t-statistic for the hypothesis test of the difference in the two population means.
United Kingdom
A sovereign country located off the northwestern coast of mainland Europe comprising England, Scotland, Wales, and Northern Ireland.
Germany
A country in Central Europe known for its rich history, cultural heritage, and significant contributions to art, science, literature, and philosophy.
Religion
A set of beliefs and practices, often centered around specific supernatural and moral claims about reality, the cosmos, and human nature, which is followed by a community or group.
Science
A systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe.
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