Suppose in Problem1 that the variance of the number of automobiles sold weekly is 9.
(a) Give a lower bound to the probability that next week’s sales are between 10 and 22, inclusively.
(b)G ive an upper bound to the probability that next week’s sales exceed 18.
Problem1
A certain component is critical to the operation of an electrical system and must be replaced immediately upon failure. If the mean lifetime of this type of component is 100 hours and its standard deviation is 30 hours, how many of these components must be in stock so that the probability that the system is in continual operation for the next 2000 hours is at least .95?
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