ex10-02
For Exercise 10.1, see page 221; for Exercise 10.2, see page 225.
10.3 Categorical and quantitative variables. A survey was conducted and respondents were asked what color car they drive and how many miles they travel per day. The variable type for “car color” and “miles per day” are
(a) both categorical.
(b) both quantitative.
(c) car color—quantitative, miles per day—categorical.
(d) car color—categorical, miles per day—quantitative.
10.4 Line graph. Which of the following is not acceptable for a line graph?
(a) Having lines that cross
(b) Having equally spaced time intervals
(c) Having time intervals that are not equally spaced
(d) Including seasonal variation
10.5 Distributions. A recent report on the religious affiliation of Hispanics says 55% are Catholic, 22% Protestant, 18% unaffiliated, and 4% other. This adds up to 99%. You conclude
(a) the remaining 1% are not accounted for.
(b) there was a calculation or data entry error.
(c) this is due to roundoff error.
(d) there is a religion missing from the survey.
10.6 Which graph? You have the average SAT score of entering freshmen for five universities. The best graphical display for these data would be a
(a) pie chart.
(b) bar graph.
(c) line graph.
(d) side-by-side bar graph.
10.7 Which graph? You want to show how the price of cable television has changed over the years. You should use a
(a) pie chart.
(b) bar graph.
(c) line graph.
(d) side-by-side bar graph.
10.8 Bar graph. For a bar graph to be accurate,
(a) it should be vertical.
(b) the bars should have equal height.
(c) the bars should touch each other.
(d) the bars should have equal width.