When comparing a sample to a population, if you know m but not s and have a sample size smaller than 30, you should conduct a _____ test. A)t B)z C)c² D)phi

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Quizplus · Accepted Answer

If you don't know the population standard deviation and have a sample size smaller than 30, you need to conduct a t-test. A t-test is used instead of a z-test because the standard error of the mean is estimated using the sample standard deviation (s) instead of the population standard deviation (σ).

When Comparing a Sample to a Population, If You Know