math

The following is a set of data from a sample of n = 5:
7 4 9 8 The following is a set of data from a sample of n = 5:
7 4 9 8 2

a. Compute the mean, median, and mode.
b. Compute the range, variance, standard deviation, and coefficient of variation.
c. Compute the Z scores. Are there any outliers?
d. Describe the shape of the data set.

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  1. The first set of data only has n = 4.

    Mode is the most frequently occurring score, if any.

    Median = 50th percentile.

    Range = highest score - lowest

    The mean = 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

    Z = (score-mean)/SD

    I'll let you do the calculations.

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