The Editor of a Major Academic Book Publisher Claims That

question 163

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 Rate

The measure of some quantity divided by the time taken to accumulate that quantity, indicating a rate of change or growth over a specified period.

Research Hypothesis

A specific, testable prediction about what you expect to happen in your study, often posed as a potential relationship between variables.

Average GPA

The median grade point average calculated by adding together the individual grade points and then dividing by the number of grades.

Geography Department

An academic department within a school or university focused on the study of geographical features, societies, and the relationships between them.