Introduction to the Practice of Statistics 9th edition by David S. Moore Test bank

 C)categorical, categorical, quantitative, categorical, quantitative.
 D)categorical, categorical, quantitative, quantitative, categorical.
 E)This cannot be determined without knowing the values of the various variables.
 
 
72.Which of the following statements are FALSE?
 A)The distribution of a categorical variable lists the categories and gives the counts or the percentages of individuals in each category.
 B)A bar chart is a useful graphical tool for describing the shape of the distribution of a categorical variable.
 C)A stemplot is particularly valuable for displaying the shape of the distribution of a categorical variable when there are few observations.
 D)A histogram shows the distribution of counts or percentages among the values of a single quantitative variable.
 E)Bar graphs, unlike histograms, can have blank spaces between the bars to separate the items being compared.
 
 
73.When examining a distribution of a quantitative variable, which of the following features do we look for?
 A)Overall shape, center, and spread
 B)Symmetry or skewness
 C)Deviations from overall patterns such as outliers
 D)The number of peaks or modes
 E)All of the above
 
 
74.In the fuel efficiency study of 2007 compact model automobiles, the following histogram of the distribution of the miles-per-gallon fuel efficiency rating in city driving (MPG-City) for automobiles manufactured in Europe was obtained.

From the histogram above, showing the distribution of MPG-City, we can see that the
 A)shape of the distribution is roughly symmetric with one peak.
 B)distribution is skewed to the left.
 C)distribution is skewed to the right.
 D)distribution is roughly symmetric with outlier values to the left.
 E)shape of the distribution would be easier to see if a stemplot had been constructed instead of the histogram.
 
 
75.The following stemplot displays the number of forest fires (in thousands) that occurred each year over the period from 1970 to 2000 in Canada, where 5|2 represents 5200 fires.
 

 
From the stemplot we can see that
 A)the shape of the distribution is skewed to the left.
 B)there appears to be one large peak.
 C)there was a total of 9 years in which more than 10,000 fires occurred.
 D)only one year had fewer than 6000 fires.
 E)All of the above
 
 
76.Statistics were gathered on the number of homicides committed with guns in Australia in the years from 1980 to 2004.From these data the following graph was constructed.

This plot is a graph of a(n) _____________, and it shows that there is/are ___________ in the data.
 A)categorical variable; skewness to the right
 B)histogram; multiple peaks
 C)line; an increasing trend
 D)quantitative variable; outlier values
 E)time series; a decreasing trend
 
 
77.Which of the following variables is categorical?
 A)The number of Facebook friends you have
 B)The amount of time a student spends on the Internet in one day
 C)The available food choices in the student cafeteria
 D)None of the above
 
 
78.According to the American Cancer Society, the decline in colorectal cancer mortality, primarily attributed to early detection and treatment, has not been consistent among race/ethnic groups. A colorectal exam is one method for early detection of colorectal cancer. In 2008, 29.5% of whites, 56.9% of African Americans, and 62.4% of Hispanics had not received a colorectal exam within the last 10 years. What is the best method to display these data?
 A)Histogram
 B)Pie chart
 C)Bar graph
 D)Stem-and-leaf plot
 
 
79.Malaria is a leading cause of infectious disease and death worldwide. The table below represents the mean number of reported malaria cases (between 1996 and 2006) for each of 10 West African countries, as published in the journal Statistica Neerlandica in 2010.
 

 
What is the best method to display these data?
 A)Histogram
 B)Pie chart
 C)Bar graph
 D)Stem-and-leaf plot
 
 
80.Malaria is a leading cause of infectious disease and death worldwide. The table below represents the mean number of reported malaria cases (between 1996 and 2006) for each of 10 West African countries, as published in the journal Statistica Neerlandica in 2010.
 

 
True or False. The variable “country” is a quantitative variable.
 A)True
 B)False