Future Electronics makes compact disc players. Its research department found that the life of the laser beam device is normally distributed, with mean 4500 hours and standard deviation 460 hours.
(a) Find the probability that the laser beam device will wear
out in 5000 hours or less. (Round your answer to four decimal
places.)
(b) Future Electronics wants to place a guarantee on the players so
that no more than 10% fail during the guarantee period. Because the
laser pickup is the part most likely to wear out first, the
guarantee period will be based on the life of the laser beam
device. How many playing hours should the guarantee cover? (Round
your answer down to the nearest hour.)
Future Electronics makes compact disc players. Its research department found that the life of the laser...
12.Future Electronics makes compact disc players. Its research department found that the life of the laser beam device is normally distributed, with mean 5460 hours and standard deviation 470 hours (a) Find the probability that the laser beam device will wear out in 5000 hours or less. (b) Future Electronics wants to place a guarantee on the players so that no more than 10% fail during the guarantee period. Because the laser pickup is the part most likely to wear out first,...
Find z such that 9% of the area under the standard normal curve lies to the right of z. Find z such that 58% of the standard normal curve lies between -z and z. Future Electronics makes compact disc players. Its research department found that the life of the laser beam device is normally distributed, w 470 hours. (a) Find the probability that the laser beam device will wear out in 5000 hours or less.