[Unlock Answer From @10/Pg] Caffeine Improves Memory

1.  If a distribution is normal with μ = 60 and σ = 15, what is the z-score of 75?

2.  If a distribution is normal with μ = 60 and σ = 15, what is the z score of 40?

3.  How can the normal distribution be used to test hypotheses about populations? Also, how might you surmise that you can use this logic to test a hypothesis such as caffeine improves memory in the caffeine study that I reference in my lectures?