Create a research question on interest 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.)
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.
Select an alpha level of .05, .01, or .001 and justify your choice.
With these thoughts in mind:
Briefly discuss the research question, the independent and dependent variables you would study, an explanation of whether a one- or two-tail test is most appropriate, your testable null and alternative hypothesis, and an explanation of which alpha level you would select and a justification of your choice.