Prior to the grounding of space shuttle program, the National Aeronautics and Space Administration (NASA) estimated that

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Prior to the grounding of space shuttle program, the National Aeronautics and Space Administration (NASA) estimated that the chance of a “critical- item” failure within a space shuttle’s main engine was approximately 1 in 63. The failure of a critical item during flight would lead directly to a shuttle catastrophe.
a. On average, how many shuttle missions would fly before a critical-item failure occurs?
b. What is the standard deviation of the number of missions before a critical-item failure occurs?
c. Give an interval that will capture the number of missions before a critical-item failure occurs with probability of approximately .95.

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Statistics For Engineering And The Sciences

ISBN: 9781498728850

6th Edition

Authors: William M. Mendenhall, Terry L. Sincich

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