Each part of this exercise provides a scenario for a hypothesis test for a population mean. Decide

Question:

Each part of this exercise provides a scenario for a hypothesis test for a population mean. Decide whether the z-test is an appropriate method for conducting the hypothesis test. Assume that the population standard deviation is known in each case.
a. Preliminary data analyses reveal that the sample data contain no outliers but that the of the variable under consideration is probably highly skewed. The sample size is 24.
b. Preliminary data analyses reveal that the sample data contain no outliers but that the of the variable under consideration is probably mildly skewed. The sample size is 70.
Distribution
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