The Editor of a Major Academic Book Publisher Claims That

question 29

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. $$\begin{array} { | c | c | c | } \hline \text { Book } & \text { Number of pages } & \text { Selling price } ( \$ ) \\\hline 1 & 844 & 55 \\\hline 2 & 727 & 50 \\\hline 3 & 360 & 35 \\\hline 4 & 915 & 60 \\\hline 5 & 295 & 30 \\\hline 6 & 706 & 50 \\\hline 7 & 410 & 40 \\\hline 8 & 905 & 53 \\\hline 9 & 1058 & 65 \\\hline 10 & 865 & 54 \\\hline 11 & 677 & 42 \\\hline 12 & 912 & 58 \\\hline\end{array}$$ Draw a scatter diagram of the data and plot the least squares regression line on it.

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Definitions:

Observations

The act of recording or noting a fact or occurrence for some scientific or analytical purpose.

Adjusted Coefficient

A modified version of a coefficient in statistical models that accounts for certain factors or variables to improve the model's accuracy or interpretability.

Independent Variables

Variables in an experiment or model that are manipulated to determine their effect on dependent variables.

Sample Size

The number of observations or data points collected in a study or experiment, critical for determining the study's statistical power and reliability.