SOLUTION: A certain bank is busiest during Friday afternoons. On Friday afternoons, the waiting time for drive-through customers is normally distributed with a mean of 8 minutes and a stand

Algebra ->  Permutations -> SOLUTION: A certain bank is busiest during Friday afternoons. On Friday afternoons, the waiting time for drive-through customers is normally distributed with a mean of 8 minutes and a stand      Log On


   

Question 1141665: A certain bank is busiest during Friday afternoons. On Friday afternoons, the waiting time for drive-through customers is normally distributed with a mean of 8 minutes and a standard deviation of 2 minutes. What percentage of drive-through customers will wait for 11 minutes or longer?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z>(11-8)/2 >3/2 or 1.5
probability of z?1.5 is 0.0668