Under what circumstances is the t statistic used instead of the Z score for a hypothesis test?

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 58E: What is meant by the sample space of an experiment?
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Under what circumstances is the t statistic used instead of the Z score for a hypothesis test?

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