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Chapter 1: Q. 71 (page 49)
You look at real estate ads for
The answer is number (c) skewed to the right.
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Which of the following is least affected if an extreme high outlier is added to your data?
(a) Median
(b) Mean
(c) Standard deviation
(d) Range
(e) Maximum
Medical study variables Data from a medical study contain values of many variables for each of the people who were the subjects of the study. Here are some of the variables recorded: gender (female or male) age (years) race (Asian, black, white, or other); smoker (yes or no) systolic blood pressure (millimetres of mercury) level of calcium in the blood (micrograms per millilitre).
Identify each as categorical or quantitative.
Here, once again, is the stem plot of travel times to work for randomly selected New Yorkers. Earlier, we found that the median was minutes.
Would the mean or the median be a more appropriate summary of the center of this distribution of drive times? Justify your answer.
Population pyramids A population pyramid is a helpful graph for examining the distribution of a country鈥檚 population. Here is a population pyramid for Vietnam in the year . Describe what the graph tells you about Vietnam鈥檚 population that year. Be specific.
Cool car colors The most popular colors for cars and light trucks change over time. Silver passed green in to become the most popular color worldwide, then gave way to shades of white in . Here is the distribution of colors for vehicles sold in North America in
(a) What percent of vehicles had colors other than those listed?
(b) Display these data in a bar graph. Be sure to label your axes and title your graph.
(c) Would it be appropriate to make a pie chart of these data? Explain.
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