Suppose the duration of trouble-free operation of a new robotic vacuum cleaner is normally distributed with mean
Question:
(a) What is the probability that the vacuum cleaner will work for at least two years without trouble?
(b) The company wishes to set the warranty period so that no more than 10% of the vacuum cleaners would need repair services while under warranty. How long a warranty period must be set?
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X number of days of troublefree operation is normally distributed with 750 a...View the full answer
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Related Book For 
Statistics Principles And Methods
ISBN: 9780470904114
7th Edition
Authors: Richard A. Johnson, Gouri K. Bhattacharyya
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