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8 May, 08:59

If accrotime guarantees a full refund on any defective watch for 2 years after purchase, what percentage of total production will the company expect to replace? (round your answer to two decimal places.)

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  1. 8 May, 09:28
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    The problem is missing some parts but nevertheless here is the solution:

    Given:

    Mean is 28

    Standard deviation is 5

    So we denote the problem as x < = 2

    For X ~ N (28, 5^2)

    we are looking for the percentage:

    P{X>24} = P {Z>z}

    Where z = (24-28) / 5 = 4/5 = - 0.80.

    P {Z> - 0.80} = 1 - P{Z< - 0.80} = 1 - 0.2119.

    Or in percentage, it is replaced as P{Z< - 0.80} = 0.2119, 21.19%.
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