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Chapter 1: Q 2.3. (page 61)
The roster of the Dallas Cowboys professional football team included 10 offensive linemen. Their weights (in pounds) were
Determine whether there are any outliers using therule.
The higher outliner is
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Fuel economy (Introduction) Here is a small part of a data set that describes the fuel economy (in miles per gallon) of model year 2009 motor vehicles:
(a) What are the individuals in this data set?
(b) What variables were measured? Identify each as categorical or quantitative.
You look at real estate ads for houses in Naples, Florida. There are many houses ranging from in price. The few houses on the water, however, have prices up to . The distribution of house prices will be
(a) skewed to the left.
(b) roughly symmetric.
(c) skewed to the right.
(d) unimodal.
(e) too high.
Income and education level Each March, the Bureau of Labor Statistics compiles an Annual Demographic Supplement to its monthly Current Population Survey.44 Data on about individuals between the ages of data-custom-editor="chemistry" who were employed full-time were collected in one of these surveys. The boxplots below compare the distributions of income for people with five levels of education. This figure is a variation of the boxplot idea: because large data sets often contain very extreme observations, we omitted the individuals in each category with the top and bottom of incomes. Write a brief description of how the distribution of income changes with the highest level of education reached. Give specifics from the graphs to support your statements.
The National Survey of Adolescent Health interviewed several thousand teens (grades 7 to 12). One question asked was 鈥淲hat do you think are the chances you will be married in the next ten years?鈥� Here is a two-way table of the responses by gender:
Your percent from the previous exercise is part of
(a) the marginal distribution of females.
(b) the marginal distribution of gender.
(c) the marginal distribution of opinion about marriage.
(d) the conditional distribution of gender among adolescents with a given opinion.
(e) the conditional distribution of opinion among adolescents of a given gender.
Comparing AP scores The table below gives the distribution of grades earned by students taking the AP Calculus AB and AP Statistics exams in
(a) Make an appropriate graphical display to compare the grade distributions for AP Calculus AB and AP Statistics.
(b) Write a few sentences comparing the two distributions of exam grades.
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