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the times required to assemble a product part are normally distributed with a mean of 54.4 minutes & a standard deviation of 5.2 minutes. What fraction of the assemble workers require more than one hour?

  • statistics -

    Z = (score-mean)/SD

    Convert hour into minutes.

    Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to that Z score.

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