Question 1

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 would be best as it shows the changes in the number of households over time. This type of graph is helpful for identifying trends and patterns in the data. A pie chart would not be appropriate for this type of data as it does not show changes over time. A stem-and-leaf display is typically used for smaller sets of data and may not be ideal for a 10-year period. A side-by-side bar chart may be useful for comparing different data sets but may not show the time-related changes in the data.

Question 2

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 3

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 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 because it will allow for a clear and easy-to-read presentation of the frequency of responses for each question. It can also provide insights into possible relationships between the variables. Stem-and-leaf displays and time-series plots are not appropriate for categorical data, and Pareto charts are better suited for displaying the relative frequencies of a single variable.

Question 5

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 would be the best choice as it allows for the display of data over time, which is important in showing the trend of increasing births over the past five years. A Pareto chart would not be useful as the data is not categorized, a two-way classification table and a histogram could show the number of births but would not show the trend over time.

Question 6

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 7

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 chart for presenting the data on 1,500 students' height because it allows for a clear and visual representation of the distribution of heights, showing the frequency of students in each height range. A pie chart is not appropriate because it is used for showing percentages or proportions of a whole, while a Pareto chart is used to show the frequency of specific events or problems in order of importance. A side-by-side bar chart is useful for comparing two or more groups, but in this case, there is only one group being analyzed.

Question 8

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 9

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 when studying the simultaneous responses to two categorical questions as it allows for the analysis of the relationship between the two variables and provides the frequency of each response combination.

Question 10

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 choice to present this information as it provides a visual representation of the distribution of the data, allowing for easy identification of patterns and outliers. A pie chart would not be appropriate for continuous data such as credit hours, and a Pareto chart would only be useful if the data had some sort of ranking or hierarchy. A contingency table would not be appropriate as the data only includes a single variable.

Question 11

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 12

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 13

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 for presenting this information because it allows for a clear comparison of the frequency of each mistake. The six different mistakes can be easily listed on the x-axis with the frequency on the y-axis. This will allow for a quick and easy visual representation of the most common mistake made during job interviews.

Question 14

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 15

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 would be the best choice to present the data since it allows for a clear visualization of how the unemployment rate changes over time. This type of plot is commonly used for tracking economic indicators and other time-dependent data. The other options, such as a contingency table or side-by-side bar chart, may not be effective in capturing the temporal aspect of the data. A stem-and-leaf display could be helpful for exploring the distribution of the data, but it may not be as useful for communicating the overall trends over time.

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, 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 total number of students who went bar hopping is 100 (30 did well + 70 did poorly). Therefore, the percent of students who went bar hopping and did well on the midterm is (30/100)*100 = 30%. However, when considering the entire sample of 200 students, the percentage is (30/200)*100 = 15%.

Question 17

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 for presenting the relationship between the retail price and energy cost per year of the refrigerators. It would allow us to visually see if there is any correlation between these two variables and if there are any outliers. A pie chart would not be appropriate since we are not looking at percentages or proportions of a whole. A side-by-side bar chart would only be appropriate if we were comparing two or more groups. A contingency table is used to display the frequency of two categorical variables and is not appropriate for this scenario.

Question 18

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

According to the cumulative frequency table provided in Scenario 2-5, 74 calls out of 100 lasted less than 15 minutes.

Question 19

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 percent of students who did well on the midterm and went bar hopping the weekend before, we need to divide the number of students who did well and went bar hopping by the total number of students who did well on the midterm and then multiply by 100 to get the percentage.

From the table, we see that out of the 200 students in the sample:
- 120 students did well on the midterm
- 44 of those students also went bar hopping the weekend before

So the percent of students who did well on the midterm and went bar hopping the weekend before is:
(44/120) x 100% = 36.67%

However, we need to round to the nearest hundredth, so the answer is:
B) 27.27%

Question 20

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 option for presenting market share data as it allows for easy comparison of the relative sizes of each search engine's share. The slices of the pie can be labeled with the name of each search engine and the percentage of market share they hold. This visual representation can quickly highlight which search engines are more dominant in the market.

Quiz 2: Organizing and Visualizing Variables

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?

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?

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?

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?

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?

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

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 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 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?

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

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?

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?

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?