CHAPTER 2: ORGANIZING AND VISUALIZING VARIABLES

When constructing charts, the following is plotted at the class midpoints: a) frequency histograms. b) percentage polygons. c) cumulative percentage polygon (ogives). d) All of the above. ANSWER: b

b

When polygons or histograms are constructed, which axis must show the true zero or "origin"? a) The horizontal axis. b) The vertical axis. c) Both the horizontal and vertical axes. d) Neither the horizontal nor the vertical axis. ANSWER: b

b

When studying the simultaneous responses to two categorical questions, you should set up a a) contingency table. b) frequency distribution table. c) cumulative percentage distribution table. d) histogram. ANSWER: a

a

Data on 1,500 students' height were collected at a larger university in the East Coast. Which of the following is the best chart for presenting the information? a) A pie chart. b) A Pareto chart. c) A side-by-side bar chart. d) A histogram. ANSWER: d

d

You have collected data on the number of U.S. households actively using online banking and/or online bill payment over a 10-year period. Which of the following is the best for presenting the data? a) A pie chart. b) A stem-and-leaf display c) A side-by-side bar chart. d) A time-series plot. ANSWER: d

d

A survey of 150 executives were asked what they think is the most common mistake candidates make during job interviews. Six different mistakes were given. Which of the following is the best for presenting the information? a) A bar chart. b) A histogram c) A stem-and-leaf display. d) A contingency table. ANSWER: a

a

At the United States Census Bureau's website, you found a data set on the race and ethnic group of an annual nationwide survey from last year. Which of the following is the best for organizing the data? a) A summary table. b) A contingency table c) A frequency distribution. d) A cumulative distribution. ANSWER: a

a

In a contingency table, the number of rows and columns a) must always be the same. b) must always be 2. c) must add to 100%. d) None of the above. ANSWER: d

d

At the United States Department of Labor's website, you found a data set on the amount of time people spent on socializing collected through the American Time Use Survey from last year. Which of the following is the best for presenting the data? a) A polygon. b) A Pareto diagram. c) A bar chart. d) A time-series plot. ANSWER: a

a

The width of each bar in a histogram corresponds to the a) differences between the boundaries of the class. b) number of observations in each class. c) midpoint of each class. d) percentage of observations in each class. ANSWER: a

a

Which of the following is appropriate for displaying data collected on the different brands of cars students at a major university drive? a) A Pareto chart b) A two-way classification table c) A histogram d) A scatter plot ANSWER: a

a

You have collected data on the responses to two questions asked in a survey of 40 college students majoring in business—What is your gender (Male = M; Female = F) and What is your major (Accountancy = A; Computer Information Systems = C; Marketing = M). Which of the following is the best for presenting the data? a) A contingency table. b) A stem-and-leaf display c) A time-series plot. d) A Pareto chart. ANSWER: a

a

You have collected information on the market share of 5 different search engines used by U.S. Internet users in a particular quarter. Which of the following is the best for presenting the information? a) A pie chart. b) A histogram c) A stem-and-leaf display. d) A contingency table. ANSWER: a

a

A type of vertical bar chart in which the categories are plotted in the descending rank order of the magnitude of their frequencies is called a a) contingency table. b) Pareto chart. c) stem-and-leaf display. d) pie chart. ANSWER: b

b

You have collected data on the approximate retail price (in $) and the energy cost per year (in $)of 15 refrigerators. Which of the following is the best for presenting the data? a) A pie chart. b) A scatter plot c) A side-by-side bar chart. d) A contingency table. ANSWER: b

b

You have collected information on the consumption by the 15 largest coffee-consuming nations. Which of the following is the best for presenting the shares of the consumption? a) A pie chart. b) A Pareto chart c) A side-by-side bar chart. d) A contingency table. ANSWER: b

b

You have downloaded data on crime rate and median income level for 150 communities. You wonder whether there is any association between crime rate and median income level. Which of the following is the best for presenting the data? a) A histogram. b) A scatter chart c) A stem-and-leaf display d) A time-series plot. ANSWER: b

b

At the United States Census Bureau's website, you found a data set on the estimated revenue for employers from 1998 to 2013. Which of the following is the best for presenting the data? a) A contingency table. b) A stem-and-leaf display c) A time-series plot. d) A side-by-side bar chart. ANSWER: c

c

At the United States Census Bureau's website, you found a data set on the race and ethnic group of an annual nationwide survey from last year. Which of the following is the best for presenting the data? a) A histogram. b) A stem-and-leaf display c) A bar chart. d) A polygon. ANSWER: c

c

At the United States Department of Labor's website, you found a data set on the amount of time people spent on socializing collected through the American Time Use Survey from last year. Which of the following is the best for organizing the data? a) A summary table. b) A contingency table. c) A percentage distribution. d) A cross-classification table. ANSWER: c

c

Data on the number of credit hours of 20,000 students at a public university enrolled in a Spring semester were collected. Which of the following is the best for presenting the information? a) A pie chart. b) A Pareto chart. c) A stem-and-leaf display. d) A contingency table. ANSWER: c

c

Retailers are always interested in determining why a customer selected their store to make a purchase. A sporting goods retailer conducted a customer survey to determine why its customers shopped at the store. The results are shown in the bar chart below. What proportion of the customers responded that they shopped at the store because of the merchandise or the convenience? Prices 20% Merchandise 50% Convenience 15% Other 15% 0% 10% 20% Responses 30% 40% 50% 60% a) 35% b) 50% c) 65% d) 85% ANSWER: c

c

You have collected data on the monthly seasonally adjusted civilian unemployment rate for the United States over a 10-year period. Which of the following is the best for presenting the data? a) A contingency table. b) A stem-and-leaf display c) A time-series plot. d) A side-by-side bar chart. ANSWER: c

c

Data on the number of part-time hours students at a public university worked in a week were collected. Which of the following is the best chart for presenting the information? a) A pie chart. b) A Pareto chart. c) A percentage table. d) A percentage polygon. ANSWER: d

d

One of the developing countries is experiencing a baby boom, with the number of births rising for the fifth year in a row, according to a BBC News report. Which of the following is best for displaying this data? a) A Pareto chart b) A two-way classification table c) A histogram d) A time-series plot ANSWER: d

d

You have collected data on the number of complaints for 6 different brands of automobiles sold in the US over a 10-year period. Which of the following is the best for presenting the data? a) A contingency table. b) A stem-and-leaf display c) A time-series plot. d) A side-by-side bar chart. ANSWER: d

d