Future Electronics makes compact disc players. Its research department found that the life of the laser beam device is normally distributed, with mean 5100 hours and standard deviation 480 hours. a) Find the probability that the laser beam device will wear out in 5000 hours or less. (Round answer to four decimal places.) b) Future Electronics wants to place a guarantee on the players so that no more than 11% 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 answer down to the nearest hour.)

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.