a study of the amount of time it takes to rebuild the transmission for a 2005 chevy cavalier shows that the mean is 8.4 hours and

a study of the amount of time it takes to rebuild the transmission for a 2005 chevy cavalier shows that the mean is 8.4 hours and the standard deviation is 1.8 hours. find the probability that the mean rebuild time exceeds 8.7 hours.

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  1. The probability that the mean rebuild time exceeds 8.7 hours is 0.43.
    Given:
    a study of the amount of time it takes to rebuild the transmission for a 2005 chevy cavalier shows that the mean is 8.4 hours and the standard deviation is 1.8 hours.
    here
    μ = 8.4
    σ = 1.8
    x = 8.7
    we know that:
    z = x – μ / σ
    = 8.7 – 8.4 / 1.8
    = 0.3/1.8
    = 03/10/18/10
    = 3/18
    = 1/6
    = 0.166
    p value at z = 0.166 is
    p = 0.43
    Therefore The probability that the mean rebuild time exceeds 8.7 hours is 0.43.
    learn more about the probability here:
    #SPJ4

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