The time between calls to a plumbing supply business is exponentially distributed with a mean time between
Question:
(a) What is the probability that there are no calls within a 30- minute interval?
(b) What is the probability that at least one call arrives within a 10-minute interval?
(c) What is the probability that the first call arrives within 5 and 10 minutes after opening?
(d) Determine the length of an interval of time such that the probability of at least one call in the interval is 0.90.
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Step by Step Answer:
Let X denote the time until the first call Then X is exponential and callsminute a PX 30 edx e e 013...View the full answer
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Related Book For 
Applied Statistics And Probability For Engineers
ISBN: 9781118539712
6th Edition
Authors: Douglas C. Montgomery, George C. Runger
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