Debrief Chapter 10

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

• both categorical.

• both quantitative.

• car color is quantitative; miles per day is categorical.

• car color is categorical; miles per day is quantitative.

Line graph.

Which of the following is not accepted for a line graph?

• Having lines that cross.

• Having equally spaced time intervals.

• Having equally time intervals that are not equally spaced.

• Including seasonal variations.

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

• the remaining 1% are not accounted for.

• there was a calculation or data entry error.

• this is due to roundoff error.

• there is a religion missing from the survey.

Which graph?

You have the average SAT score of entering freshman for five universities. The best graphical display for these data would be a

• pie chart.

• bar graph.

• line graph.

• side-by-side bar graph.

Which graph?

You want to show how the price of cable television has changed over the years. You should use a

• pie chart.

• bar graph.

• line graph.

• side-by-side bar graph.

Bar graph

For a bar graph to be accurate

• the bars must be vertical rather than horizontal.

• the bars should have equal height.

• the bars must touch each other.

• the bars should have equal width.