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It is known from past experience that the life of a machine component is approximately normally distributed with mean equal to 200 hours and a standard deviation of 4 hours. Calculate the probability that a randomly selected componet has a life of
a)at least 206 hours
b) between 204 hours and 208hours.
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    Degree
    January 2011

    Assignment
    Business statistics

    Botswana College of Distance and Open Learning
    I n Collaboration with

    Z imbabwe Open University

    B ACHELOR OF COMMERCE

    B USINESS STATISTICS
    (...
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