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Two Cal Poly freshmen gathered data on the prices for a random sample of 30 textbooks from the campus bookstore.They found the average price was

Two Cal Poly freshmen gathered data on the prices for a random sample of 30 textbooks from the campus bookstore.They found the average price was $82.96, and the standard deviation of prices was $7.29.The data were not strongly skewed.

a. Identify the observational units and sample size for this study.

b. Identify the variable of interest and whether it is categorical or quantitative

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