Latest Questions & Answers

Q: Does a higher state per capita income equate to a higher per

Does a higher state per capita income equate to a higher per capita beer consumption? From the document Survey of Current Business, published by the U.S. Bureau of Economic Analysis, and from the Brew...

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Q: Polychlorinated biphenyls (PCBs), industrial pollutants, are known to be

Polychlorinated biphenyls (PCBs), industrial pollutants, are known to be carcinogens and a great danger to natural ecosystems. As a result of several studies, PCB production was banned in the United S...

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Q: The National Oceanic and Atmospheric Administration publishes temperature information of cities around

The National Oceanic and Atmospheric Administration publishes temperature information of cities around the world in Climates of the World. A random sample of 50 cities gave the data on average high an...

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Q: In the article, “Ghost of Speciation Past” (Nature

In the article, “Ghost of Speciation Past” (Nature, Vol. 435, pp. 29–31), T. Kocher looked at the origins of a diverse flock of cichlid fishes in the lakes of southeast Africa. Suppose that you wanted...

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Q: On the WeissStats site are data on home size (in square

On the WeissStats site are data on home size (in square feet) and assessed value (in thousands of dollars) for the same homes. a. Obtain a scatterplot for the data. b. Decide whether finding a regress...

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Q: The document Arizona Residential Property Valuation System, published by the Arizona

The document Arizona Residential Property Valuation System, published by the Arizona Department of Revenue, describes how county assessors use computerized systems to value single-family residential p...

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Q: Box Office Mojo collects and posts data on movie grosses. For

Box Office Mojo collects and posts data on movie grosses. For a random sample of 50 movies, we obtained both the domestic (U.S.) and overseas grosses, in millions of dollars. The data are presented on...

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Q: The Information Please Almanac provides data on the ages at inauguration and

The Information Please Almanac provides data on the ages at inauguration and of death for the presidents of the United States. We give those data on the WeissStats site for those presidents who are no...

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Q: How important are birdies (a score of one under par on

How important are birdies (a score of one under par on a given golf hole) in determining the final total score of a woman golfer? From the U.S. Women’s Open website, we obtained data on number of bird...

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Q: Apply the empirical rule to solve each exercise. The data

Apply the empirical rule to solve each exercise. The data set has mean 10 and standard deviation 3. Fill in the following blanks: a. Approximately 68% of the observations lie between ___ and ____. b....

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