Question 1

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

Accepted Answer

The answer of Which of the following is appropriate for...

Question 2

SCENARIO 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. $$\begin{array} { l c } 
\text { Time(inMinutes) } & \begin{array} { c } 
\text { Relative } \
\text { Frequency }
\end{array} \
\hline 0 \text { but less than } 5 & 0.37 \
5 \text { but less than } 10 & 0.22 \
10 \text { but less than } 15 & 0.15 \
15 \text { but less than } 20 & 0.10 \
20 \text { but less than } 25 & 0.07 \
25 \text { but less than } 30 & 0.07 \
30 \text { or more } & 0.02
\end{array}$$
-Referring to Scenario 2-5, if 100 calls were sampled, of them would have lasted less than 15 minutes.
A)26
B)74
C)10
D)None of the above.

Accepted Answer

The cumulative percentage of calls that lasted less than 15 minutes is 74%. This means that out of 100 calls, 74 of them would have lasted less than 15 minutes.

Question 3

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.

Accepted Answer

A contingency table is the best choice for studying the simultaneous responses to two categorical questions, as it displays the frequency of each combination of responses. This allows for analysis of the relationship between the two variables.

Question 4

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.

Accepted Answer

A contingency table is the best choice for presenting the data as it allows for easy comparison of the responses to both questions. It organizes the data into rows and columns based on the categories of each question, and displays the frequency or percentage of responses for each combination of categories. This allows us to understand the relationship between gender and major among the surveyed college students.

Question 5

SCENARIO 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. $$\begin{array} { l c } 
\text { Time(inMinutes) } & \begin{array} { c } 
\text { Relative } \
\text { Frequency }
\end{array} \
\hline 0 \text { but less than } 5 & 0.37 \
5 \text { but less than } 10 & 0.22 \
10 \text { but less than } 15 & 0.15 \
15 \text { but less than } 20 & 0.10 \
20 \text { but less than } 25 & 0.07 \
25 \text { but less than } 30 & 0.07 \
30 \text { or more } & 0.02
\end{array}$$
-Referring to Scenario 2-5, if 100 calls were sampled, of them would have lasted 20 minutes or more.
A)26
B)16
C)74
D)None of the above.

Accepted Answer

The answer of SCENARIO 2-5
The following are the duration in...

Question 6

You have collected information on the market share of 5 different search engines used by U.S.Internet users in a 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.

Accepted Answer

A pie chart is the best choice for presenting market share data, as it visually shows the percentage of total market share for each search engine.

Question 7

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.

Accepted Answer

A bar chart is the best choice to present this type of categorical data. It allows for easy comparison of the frequency of each mistake and can also show the overall distribution of the responses. For example, the length of each bar can be used to represent the percentage of executives who identified each mistake.

Question 8

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.

Accepted Answer

A stem-and-leaf display would be the best for presenting this information because it allows for a clear representation of the distribution of credit hours, including the range of values and any possible outliers. A pie chart would not be appropriate because it is used to represent proportions or percentages and the data is not categorical. A Pareto chart would not be ideal because it is used to show the relative frequency of different categories in descending order, and again, the data is not categorical. A contingency table is used to show the frequency of the intersection of two categorical variables and would not be appropriate for this data.

Question 9

SCENARIO 2-6
A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm.The following table contains the result. $$\begin{array} { | l | l | l | } 
\hline & \text { Did Well in Midterm } & \text { Did Poorly in Midterm } \
\hline \text { Studying for Exam } & 80 & 20 \
\hline \text { Went Bar Hopping } & 30 & 70 \
\hline
\end{array}$$
-Referring to Scenario 2-6, percent of the students in the sample went bar hopping the weekend before the midterm and did well on the midterm.
A)15
B)27.27
C)30
D)50

Accepted Answer

The answer of SCENARIO 2-6
A sample of 200 students at...

Question 10

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.

Accepted Answer

A time-series plot is the best choice for presenting data over a 10-year period as it allows for trends and patterns to be easily observed and analyzed over time. A pie chart would not be appropriate as it is used to show proportions of a whole, while a stem-and-leaf display would not be ideal for presenting data over multiple years. A side-by-side bar chart could be used, but it may not be as effective as a time-series plot in identifying significant changes or trends.

Question 11

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.

Accepted Answer

A scatter plot would be the best choice as it allows for the visualization of the relationship between the two variables (retail price and energy cost per year) for each individual refrigerator. This can help identify any patterns or trends in the data. A pie chart would not be appropriate for continuous variables like retail price and energy cost. A side-by-side bar chart would be better suited for comparing the two variables across groups or categories. A contingency table is used for summarizing categorical data.

Question 12

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.

Accepted Answer

A histogram is the best choice for presenting data on height as it shows the frequency distribution of continuous data. It will allow for easy visualization of the distribution of heights and any patterns, such as if there is a normal or skewed distribution. A pie chart and a Pareto chart are not appropriate for continuous data, and a side-by-side bar chart is better suited for comparing categorical data.

Question 13

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.

Accepted Answer

A percentage polygon is a graph that shows the percentage of data falling into different categories. In this case, it can be used to show the percentage of students working a certain number of hours per week, making it easier to compare the distribution of part-time hours. A pie chart is not appropriate for showing a distribution of data, and a Pareto chart and percentage table do not effectively display the data in a visual manner.

Question 14

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

Accepted Answer

A time-series plot is best for displaying this data as it shows the trend of the number of births over time, which is the key feature of this data. A Pareto chart is used for showing the relative frequency of different categories, a two-way classification table is used for comparing two categorical variables, and a histogram is used for showing the distribution of a continuous variable.

Question 15

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.

Accepted Answer

The answer of You have collected information on the consumption...

Question 16

SCENARIO 2-6
A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm.The following table contains the result. $$\begin{array} { | l | l | l | } 
\hline & \text { Did Well in Midterm } & \text { Did Poorly in Midterm } \
\hline \text { Studying for Exam } & 80 & 20 \
\hline \text { Went Bar Hopping } & 30 & 70 \
\hline
\end{array}$$
-Referring to Scenario 2-6, of those who went bar hopping the weekend before the midterm in the sample, percent of them did well on the midterm.
A)15
B)27.27
C)30
D)55

Accepted Answer

The answer of SCENARIO 2-6
A sample of 200 students at...

Question 17

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.

Accepted Answer

The answer of You have collected data on the number...

Question 18

You have collected data on the monthly seasonally adjusted civilian unemployment rate for theUnited 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.

Accepted Answer

A time-series plot is the best choice for presenting data on the monthly seasonally adjusted civilian unemployment rate for the United States over a 10-year period. This type of plot can show trends and patterns over time, allowing for easy visualization of changes in the unemployment rate. Contingency tables and stem-and-leaf displays are better suited for categorical data, while side-by-side bar charts are more appropriate for comparing data between different groups or categories.

Question 19

SCENARIO 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. $$\begin{array} { l c } 
\text { Time(inMinutes) } & \begin{array} { c } 
\text { Relative } \
\text { Frequency }
\end{array} \
\hline 0 \text { but less than } 5 & 0.37 \
5 \text { but less than } 10 & 0.22 \
10 \text { but less than } 15 & 0.15 \
15 \text { but less than } 20 & 0.10 \
20 \text { but less than } 25 & 0.07 \
25 \text { but less than } 30 & 0.07 \
30 \text { or more } & 0.02
\end{array}$$
-Referring to Scenario 2-5, if 100 calls were sampled, of them would have lasted less than 5 minutes or at least 30 minutes or more.
A)35
B)37
C)39
D)None of the above.

Accepted Answer

The answer of SCENARIO 2-5
The following are the duration in...

Question 20

SCENARIO 2-6
A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm.The following table contains the result. $$\begin{array} { | l | l | l | } 
\hline & \text { Did Well in Midterm } & \text { Did Poorly in Midterm } \
\hline \text { Studying for Exam } & 80 & 20 \
\hline \text { Went Bar Hopping } & 30 & 70 \
\hline
\end{array}$$
-Referring to Scenario 2-6, of those who did well on the midterm in the sample, percent of them went bar hopping the weekend before the midterm.
A)15
B)27.27
C)30
D)50

Accepted Answer

To find the percentage of students who did well on the midterm and went bar hopping the weekend before, we need to look at the cell in the table where the row is "Did Well" and the column is "Went Bar Hopping." This cell has a value of 27, which represents 27 students out of the 100 who did well on the midterm. To find the percentage, we can divide 27 by 100 and then multiply by 100 to get 27%. Therefore, the answer is B, 27.27%.

Quiz 2: Organizing and Visualizing Variables

Which of the following is appropriate for displaying data collected on the different brands of cars students at a major university drive?

When studying the simultaneous responses to two categorical questions, you should set up a

You have collected information on the market share of 5 different search engines used by U.S.Internet users in a quarter.Which of the following is the best for presenting the information?

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?

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?

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?

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?

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?

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?

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?

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?

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?

You have collected data on the monthly seasonally adjusted civilian unemployment rate for theUnited States over a 10-year period.Which of the following is the best for presenting the data?