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Math computations

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An examination is normally distributed with a mean score of 77 and a deviation of 6. find the percent of individuals scoring as indicated below:
between 71-83
between 83-65
above 89
less than 65
between 77 and 65

  • Math computations -

    Z = (score-mean)/SD

    Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to the Z scores.

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