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AnswersCase! - Helen Kolpakov 1 A The page costs are...

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20000 15000 10000 5000 0 100000 80000 60000 40000 20000 0 circ pagecost Scatterplot of pagecost vs circ Helen Kolpakov 1. A) The page costs are slightly skewed to the right meaning that the majority of the costs fall below the average of $83,534 The circulation of newspapers is also skewed to the right, this time more so than the page cost. This means that the majority of the newspapers fall below the mean. Bi modal distribution with no apparent skewness, the distribution of the percentage of men reading the newspaper is not normal because there is a significant amount of percentages on both the left and the right side of the mean. The distribution of the medium income is approximately normal as it follows a nice bell shaped curve. B) pagecost versus circ pagecost = 21612 + 4.93 circ S = 13757.0 R-Sq = 64.9% R- Sq(adj) = 64.1% The circulation statistics are approximately linear and do have a relatively strong relationship because both r-sq and r-sq adjusted are over .5
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pagecost versus percmale pagecost = 39027 - 52 percmale S = 23170.9 R-Sq = 0.4% R-Sq(adj) = 0.0%
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