Probability for normal distribution
Replacement times for new Ford Taurus GL automobiles are
normally distributed with a mean of 7.1 years and a standard deviation of 1.4
years. Find the probability that seven randomly selected Taurus GL automobiles
will have a mean replacement time greater than 7.0 years.
Among U.S. households, 24% have telephone answering machines.
If a telemarketing campaign involves 2,500 households, find the probability
that more than 650 have answering machines.





