Question: In a hypothesis test, the claim is =15.7. A sample 31 has a mean of 15 and a population standard deviation of 1.3 from a

In a hypothesis test, the claim is =15.7. A sample 31 has a mean of 15 and a population standard deviation of 1.3 from a normally distributed data set. In this hypothesis test, would a z test statistic be used or a t test statistic and why?

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