Cost of Books
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 analyze the claim,a university student visits the bookstore and records the number of pages and the selling price of twelve randomly selected books.These data are listed below.
-{Cost of Books Narrative} Can we infer at the 5% significance level that the editor is correct?

Question

Cost of Books 
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 analyze the claim,a university student visits the bookstore and records the number of pages and the selling price of twelve randomly selected books.These data are listed below.  ​ ​
-{Cost of Books Narrative} Can we infer at the 5% significance level that the editor is correct?

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The Answer of Cost of Books 
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 analyze the claim,a university student visits the bookstore and records the number of pages and the selling price of twelve randomly selected books.These data are listed below.  ​ ​
-{Cost of Books Narrative} Can we infer at the 5% significance level that the editor is correct?