The output voltage of a power supply is normally distributed with mean 5 V and standard deviation 0.02 V. If the lower and upper specifications for voltage are 4.95 V and 5.05 V, respectively. a. What is the probability that a power supply selected at random will conform to the specifications on voltage? b. Suppose we want to improve the process. Can shifting the mean reduce the number of nonconforming units produced? c. How much would the process variability need to be reduced in order to have all but one out of 1000 units conform to the specifications?
