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    Deciding whether to use a z test or a t test

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    How do we decide whether to use a z test or a t test when testing a hypothesis about a population mean?

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    https://brainmass.com/statistics/hypothesis-testing/deciding-whether-ztest-ttest-292736

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    Hypothesis
    How do we decide whether to use a z test or a t test when testing a hypothesis about a population mean?
    Answer
    Z-test and t-test are basically the same; they compare between two means to suggest whether both samples come from the same population. The main requirements for these two tests are given below.

    Data types that can be analyzed with z-tests
    • Data points ...

    Solution Summary

    The solution provides a detailed explanation on whether to use a z-test or a t-test when testing a hypothesis about a population mean.

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