lecture15[1] - buying power as in 1980? Histogram of...

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Part II in the text covers a fair amount of new material Use to use graphical and numerical techniques to say something about the data Should be able to use these to help tell the story of the data (e.g., Old Faithful example) Read review (pages 359-363)
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There is a scatter-plot in the text that show a linear relationship between average brain weight and average body weight of 96 mammals The correlation was found to be r=0.86 How well does body weight help explain brain weight (based on this linear relationship) for mammals?
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A family had a household income of $30,000 in 1980 when the CPI was 82.4. The CPI in 2007 was 207.3. How much must this family earn in 2007 to have the same
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Unformatted text preview: buying power as in 1980? Histogram of Tuition for 60 Canadian Universities Tuition ($) Frequency 2000 4000 6000 8000 10000 12000 5 10 15 20 25 2 7 15 17 5 2 5 5 2 Mean or median? Middletown is considering a new tax. The government wants to know the average income of its citizens so that it can estimate its tax base. In a study of the standard of living of typical families in Middletown, a sociologist estimates the average family income in the city. Distribution of scores on a standardized test can be approximated by a normal distribution with mean of 500 and standard deviation of 100. What percent of students scored between 330 and 670...
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lecture15[1] - buying power as in 1980? Histogram of...

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