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March 27, 2017

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For a normal distribution with µ = 200 and ó = 50, what X values form the boundaries for the middle 60% of the distribution?

  • statistics - ,

    Z = (score-mean)/SD

    Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion (± .30 to mean) to find the Z score. Insert into equation and solve. Remember to double to represent each side.

  • statistics - ,

    242.081, 157.919

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