Create a research question you are interested in for which the appropriate test of the statistical hypothesis would require the use of a z-score. (If you are not sure of the population mean for the variable of interest, you may invent a hypothetical population mean for the sake of this Discussion.) You will not need SPSS to complete this Discussion question.
For this research question:
Clearly identify the independent and dependent variables you would study.
Determine whether a one-tail or two-tail test is most appropriate and explain why.
Generate a testable null statistical hypothesis and an alternative statistical hypothesis.