Math

calculate the range, variance, standard deviation, and interquartile range for the data set given {72, 80, 80, 82, 88, 90, 96}

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  1. Range = highest score - lowest

    Find the mean first = sum of scores/number of scores

    Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.

    Standard deviation = square root of variance

    Interquartile range = 75th percentile - 25th percentile

    I'll let you do the calculations.

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    posted by PsyDAG

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