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Show work and explain For the following sample scores come from a discrete variable: 9, 7, 6, 5, 5, 4, 5, 7. a. Sketch a

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For the following sample scores come from a discrete variable: 9, 7, 6, 5, 5, 4, 5, 7. a. Sketch a histogram of the frequency distribution, and describe its shape. (4 points) b. Find the mean, median, and mode. (6 points) c. What's the percentile rank of score 6? (2 points) d. Calculate SS, sample variance, and sample standard deviation. (10 points)

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