Question 1

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?

Accepted Answer

A time-series plot would be the best choice for displaying this data as it shows the change in the number of births over time, which is the key feature of the situation described. A Pareto chart would not be appropriate as it is used for displaying categorical data and ranking the causes of a problem. A two-way classification table would not be useful in this case as it is used for comparing two categorical variables. A histogram would not be appropriate as it is used for displaying the distribution of continuous 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.
 
-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.

Accepted Answer

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

Question 3

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?

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 4

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.
 
-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.

Accepted Answer

To find the percentage of students who did well on the midterm and went bar hopping, we need to look at the "Did Well" row and find the proportion of students who also went bar hopping, which is 6 out of 22. To convert this to a percentage, we divide 6 by 22 and multiply by 100, giving us 27.27%. Therefore, the correct answer is choice B.

Question 5

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?

Accepted Answer

A histogram is the best chart for displaying continuous data, such as height measurements. It allows for the data to be grouped into intervals and visually displays the frequency of each group.

Question 6

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.

-Referring to Scenario 2-5,if 100 calls were sampled,of ---- them would have lasted less than 15 minutes.

Accepted Answer

Based on the information provided in Scenario 2-5, which is not visible in this context, the correct answer is inferred to be B) 74. This suggests that in the scenario described, 74 out of 100 calls lasted less than 15 minutes.

Question 7

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.

-Referring to Scenario 2-5,if 100 calls were randomly sampled,----of them would have lasted at least 15 minutes but less than 20 minutes

Accepted Answer

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

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?

Accepted Answer

A side-by-side bar chart is the best way to present the data because it allows for easy comparison of the number of complaints for each brand of automobile over time.

Question 9

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.

-Referring to Scenario 2-5,if 100 calls were sampled,of ----them would have lasted 20 minutes or more.

Accepted Answer

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

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?

Accepted Answer

A stem-and-leaf display is the best choice for presenting the information because it allows for a clear visualization of the distribution of credit hours for the 20,000 students. It also provides specific data points and allows for easy comparisons between groups of students. Pie charts and Pareto charts are not appropriate for displaying continuous data like credit hours, and a contingency table is not necessary as there is only one variable being analyzed.

Question 11

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?

Accepted Answer

A pie chart is the best choice for presenting market share data as it visually shows the proportion of each search engine's share in relation to the whole market, making it easy for viewers to compare and understand the data.

Question 12

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

Accepted Answer

A Pareto chart is suitable for displaying categorical data, such as different brands of cars, by showing the frequency or count of each category in descending order.

Question 13

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?

Accepted Answer

A contingency table is the best choice for presenting the data as it allows for easy comparison and analysis of the responses to both questions. The table would have rows for the gender (M/F) and columns for the major (A/C/M), with the intersecting cells showing the number of respondents for each combination. This allows for easy identification of any patterns or relationships between gender and major. A stem-and-leaf display and time-series plot are not appropriate for this type of categorical data. A Pareto chart may be useful for presenting the relative frequencies of different responses within each question, but it would not allow for analysis of the relationship between the two variables.

Question 14

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

Accepted Answer

When studying the simultaneous responses to two categorical questions, a contingency table is the best choice. It allows for the comparison of the frequency distribution of the two variables and the calculation of conditional probabilities. This type of table is especially useful in analyzing relationships between two categorical variables.

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?

Accepted Answer

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

Question 16

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?

Accepted Answer

A scatter plot is the best choice for presenting the data as it can effectively display the relationship between the two variables (approximate retail price and energy cost per year) for each of the 15 refrigerators. It allows for visualization of any potential patterns or trends in the data, such as whether higher-priced refrigerators tend to have higher or lower energy costs. A pie chart would not be appropriate as it is not suitable for displaying numerical data with multiple categories. A side-by-side bar chart could work but may not be as effective as a scatter plot in displaying the relationship between the two variables. A contingency table is not relevant as it is used for displaying the counts or proportions of observations falling into two or more categorical variables.

Question 17

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?

Accepted Answer

A time-series plot is the most appropriate choice for this type of data as it shows changes over time. A pie chart would not be suitable as it does not show changes over time and would only represent a snapshot in time. A stem-and-leaf display and side-by-side bar chart could potentially be used but are not as effective as a time-series plot for showing trends over a 10-year period.

Question 18

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?

Accepted Answer

The best way to present the monthly seasonally adjusted civilian unemployment rate for the United States over a 10-year period would be a time-series plot. A time-series plot allows us to see trends over time and any seasonality in the data, providing a clear visualization of the changes in the unemployment rate.

Question 19

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?

Accepted Answer

A bar chart is the best choice for presenting this information because it allows for easy comparison of the frequency of each of the six different mistakes. This is because each mistake can be represented by a different colored bar, and the height of the bars would represent the frequency or number of executives who selected that mistake as the most common. A histogram would also work, but it would be more suitable if we were examining a range of values instead of discrete categories. A stem-and-leaf display and a contingency table would not be appropriate for this type of data.

Question 20

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.

-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.

Accepted Answer

The correct answer is 39, as it is the sum of calls lasting less than 5 minutes and those lasting at least 30 minutes or more, based on the given scenario.

Quiz 2: Organizing and Visualizing Variables

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?

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. -Referring to Scenario 2-5,if 100 calls were sampled,of ---- them would have lasted less than 15 minutes.

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?

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. -Referring to Scenario 2-5,if 100 calls were sampled,of ----them would have lasted 20 minutes or more.

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 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?

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 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 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 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 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 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?