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Mathematics, 27.10.2021 22:30 jazzycintron14

Across all the models and firms in this dataset, what is the single overall average monthly model sales? What is the standard deviation of monthly model sales? Are there any outliers (i. e., sales in a month for a model that are more than 3 standard deviations from the mean)? If so, what models have at least one outlier?

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