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statistics

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The scores on a test for a very large class is normally distributed with mean 64 points and
standard deviation 6 points. The department decides to award A to the highest 5% scores.
What is the minimum score to receive an A for the course? Round your answer (down)
to nearest whole number.

  • 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 (.05) to get a Z score. Insert the values in the above equation and solve for the score.

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