Homework Problems
1. The commuter trains on the Red Line for a city have a waiting time during peak rush hour periods of ten minutes.
State the random variable.
Find the height of this uniform distribution.
Find the probability of waiting between four and six minutes.
Find the probability of waiting more than 6 minutes.
2. Find the z-score corresponding to the given area. Remember, z is distributed as the standard normal distribution with mean of and standard deviation .
The area to the left of z is 25%.
The area to the right of z is 65%.
The area between and z is 90%. (Hint draw a picture and figure out the area to the left of the .)