1. Even if is unknown, what is the assumption about the probability distribution of the population...

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1. Even if σ is unknown, what is the assumption about the probability distribution of the population for the measurement being studied?
2. Under what conditions should we use a z test or a t test when testing hypotheses about a population mean?

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Business Statistics For Contemporary Decision Making

ISBN: 9781119577621

3rd Canadian Edition

Authors: Ken Black, Ignacio Castillo

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