1. Below are the monthly sales (in $100 000) for a sporting goods store. Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec 10 8 10 8 10 8 6 5 10 11 11 20 a) Find the standard deviation of the sales.

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b) Determine Q1 and Q3 .

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c) Display this data in a well labeled box-and-whisker plot.

/3C d) Recall that a datum which is least 1.5 times the box length away from the box is classified as an outlier. Is the sales amount for December considered an outlier? Justify your answer.