Question 226584
this is all in a z-score table


A) 2 is 1.2 below 3.2 ___ -1.2/.8 = -1.5 ___ this is the z-score
using the table ___ 5.6% are BELOW 2 cups per day, so 94.4% drink at least 2 cups per day



B) 4 is .8 above 3.2 so the z-score is 1
using the table ___ 84.1% drink no more than 4 cups per day



C) using the table ___ the top 5% have a z-score of 1.645 or above
.8 * 1.645 = 1.32 ___ 3.2 + 1.32 = 4.52
so the top 5% drink at least 4.52 cups per day