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    Finding the mean of a normal distribution of scores

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    A psychologist has designed a questionnaire to measure individuals' aggressiveness. Suppose that the scores on the questionnaire are normally distributed with a standard deviation of 80. Suppose also that exactly 15% of the scores exceed 700. Find the mean of the distribution of scores. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.

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    https://brainmass.com/statistics/standard-deviation/mean-normal-distribution-scores-69422

    Solution Summary

    This solution calculates the mean of a normal distribution of scores. The questionnaires which are normal distributed with a standard deviation is determined.

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