The Editor of a Major Academic Book Publisher Claims That

question 3

Essay

The editor of a major academic book publisher claims that a large part of the cost of books is the cost of paper. This implies that larger books will cost more money. As an experiment to analyse the claim, a university student visits the bookstore and records the number of pages and the selling price of 12 randomly selected books. These data are listed below. $$\begin{array} { | c | c | c | } \hline \text { Book } & \text { Number of pages } & \text { Selling price } ( \$ ) \\\hline 1 & 844 & 55 \\\hline 2 & 727 & 50 \\\hline 3 & 360 & 35 \\\hline 4 & 915 & 60 \\\hline 5 & 295 & 30 \\\hline 6 & 706 & 50 \\\hline 7 & 410 & 40 \\\hline 8 & 905 & 53 \\\hline 9 & 1058 & 65 \\\hline 10 & 865 & 54 \\\hline 11 & 677 & 42 \\\hline 12 & 912 & 58 \\\hline\end{array}$$ Interpret the value of the slope of the regression line.

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Definitions:

Average Cost Formulas

A method used in accounting to calculate the cost of goods sold and ending inventory by averaging the cost of all items available for sale during the period.

Unit Cost

The expense incurred to produce, store, and sell one unit of a product or service.

Unit Cost

The cost to produce, acquire, or purchase one unit of a product or service, calculated by dividing total costs by the number of units produced or acquired.

Inventory

The total amount of goods or materials in stock, which a business holds to ultimately sell for a profit.