In order to receive full credit on calculated answers, please show your work. (Use Word''s equation editor, etc., and/or provide a short written description as to how you obtained the final result.)
Q-1
Explain when a z-test would be appropriate over a t-test
Q-2
Researchers routinely choose an alpha level of 0.05 for testing their hypotheses. What are some experiments for which you might want a lower alpha level (e.g., 0.01)? What are some situations in which you might accept a higher level (e.g., 0.1)?