Question 1

TABLE 2-7
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 Table 2-7, 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 TABLE 2-7
A sample of 200 students at...

Question 2

You have collected data on the monthly seasonally adjusted civilian unemployment rate for the United States from 1998 to 2007. Which of the following is the best for presenting the data?

Accepted Answer

A time-series plot is the best choice for presenting data on a continuous variable over time, as it allows for easy visualization of trends and patterns. A contingency table and side-by-side bar chart would be more appropriate for displaying categorical data, while a stem-and-leaf display is better suited for smaller datasets.

Question 3

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 4

TABLE 2-7
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 Table 2-7, if the sample is a good representation of the population, we can expect ________ percent of those who spent the weekend studying to do poorly on the midterm.

Accepted Answer

The answer of TABLE 2-7
A sample of 200 students at...

Question 5

TABLE 2-7
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 Table 2-7, ________ percent of the students in the sample spent the weekend studying and did well on the midterm.

Accepted Answer

The answer of TABLE 2-7
A sample of 200 students at...

Question 6

You have collected data on the number of U.S. households actively using online banking and/or online bill payment from 1995 to 2007. Which of the following is the best for presenting the data?

Accepted Answer

A time-series plot is the best choice for presenting data collected over time, such as the number of U.S. households using online banking and/or bill payment from 1995 to 2007. This type of plot allows for trends and patterns over time to be easily visualized.

Question 7

You have collected information on the market share of 5 different search engines used by U.S. Internet users in May 2007. Which of the following is the best for presenting the information?

Accepted Answer

A pie chart is a good option for presenting market share data because it allows viewers to easily compare each search engine's share relative to the others. It also provides a visual representation of the total market share, making it easy to see the relative sizes of each search engine's share.

Question 8

In a contingency table, the number of rows and columns

Accepted Answer

The answer of In a contingency table, the number of...

Question 9

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 would be the best chart for presenting the heights of the 1,500 students because it allows for a visual representation of the distribution of the data, showing how many students fall within each height range. A pie chart would not be appropriate because it is typically used for categorical data, such as proportions of a whole. A Pareto chart would not be appropriate because it is typically used to show relative frequency or count of categories in descending order. A side-by-side bar chart would not be efficient for displaying a large amount of continuous numerical data.

Question 10

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 would be the best choice to present this categorical data since it allows for easy comparison of the frequencies of each of the six different mistakes. A histogram would not be appropriate because it is used for continuous data, while a stem-and-leaf display is better for smaller data sets. A contingency table would be useful if we wanted to compare the frequencies of two categorical variables.

Question 11

TABLE 2-7
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 Table 2-7, of those who did well on the midterm in the sample, ________ percent of them went bar hopping the weekend before the midterm.

Accepted Answer

The percentage of students who did well on the midterm and went bar hopping is (30/110)*100 = 27.27%.

Question 12

TABLE 2-7
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 Table 2-7, ________ percent of the students in the sample went bar hopping the weekend before the midterm and did well on the midterm.

Accepted Answer

The answer of TABLE 2-7
A sample of 200 students at...

Question 13

TABLE 2-7
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 Table 2-7, if the sample is a good representation of the population, we can expect ________ percent of those who did poorly on the midterm to have spent the weekend studying.

Accepted Answer

Out of the 50 students who did poorly, 9 of them spent the weekend studying. Therefore, the percentage of those who did poorly and spent the weekend studying is (9/50)*100, which equals 18%. However, we are only considering the sample of 200 students, so we must multiply this percentage by 2 to get an estimate for the entire population. Therefore, the expected percentage of those who did poorly and spent the weekend studying is 36%. The closest choice is B, which is 22.22%. Therefore, B is the best choice.

Question 14

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 data on categorical variables such as gender and major, as it allows for easy comparison and analysis of the data. It displays the frequency and percentage of responses for each category and helps identify any patterns or relationships between the variables. Stem-and-leaf displays, time-series plots, and Pareto charts are more suitable for continuous numerical data.

Question 15

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 best for presenting the information because it allows for the display of all credit hour values and their frequencies in a clear and concise manner, making it easy to see patterns and identify outliers in the data. A pie chart is not appropriate for numerical data, and a Pareto chart is typically used for categorical data. A contingency table is used to display the frequencies of two categorical variables, and is not applicable for this scenario.

Question 16

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 type of line graph that displays the percentage of data points that fall within each interval. In this case, a percentage polygon can effectively show the distribution of the data by displaying the percentage of students who work a certain number of part-time hours per week. This allows for easy comparison between different intervals and gives a clear picture of how much of the data falls into each category. A pie chart is not appropriate for displaying quantitative data and a Pareto chart is typically used for categorical data with a frequency count. A percentage table could be used, but a percentage polygon would provide a more visual representation of the data.

Question 17

TABLE 2-7
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 Table 2-7, if the sample is a good representation of the population, we can expect ________ percent of the students in the population to spend the weekend studying and do poorly on the midterm.

Accepted Answer

If the sample is a good representation of the population, the percentage of students who spend the weekend studying and do poorly on the midterm should match the percentage observed in the sample, which is 10%.

Question 18

You have collected data on the annual average amount of cash rebate offered by 6 different brands of automobiles sold in the US in 2006 and in 2007. Which of the following is the best for presenting the data?

Accepted Answer

A side-by-side bar chart is ideal for comparing the annual average cash rebates offered by different brands across two years, allowing for easy visual comparison between 2006 and 2007.

Question 19

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 chart would be the best choice for presenting data on the relationship between two continuous variables, such as the price and energy cost of refrigerators. It would allow for the visualization of any patterns or trends in the data, and for the identification of any potential outliers. A pie chart would not be appropriate for this type of data, as it is designed for categorical data. A side-by-side bar chart would be more appropriate for comparing data across different categories, rather than across continuous variables. A contingency table would not be appropriate for this type of data, as it is designed for summarizing categorical data in terms of the frequency or proportion of observations in each combination of categories.

Question 20

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

Accepted Answer

A contingency table is the best choice for studying simultaneous responses to two categorical questions. It allows us to display the frequency counts for each combination of categorical variables, providing a clear visual representation of the relationship between the variables.

Quiz 2: Presenting Data in Tables and Charts

You have collected data on the monthly seasonally adjusted civilian unemployment rate for the United States from 1998 to 2007. Which of the following is the best for presenting the 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 U.S. households actively using online banking and/or online bill payment from 1995 to 2007. 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 May 2007. Which of the following is the best for presenting the information?

In a contingency table, the number of rows and columns

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 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?

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?

You have collected data on the annual average amount of cash rebate offered by 6 different brands of automobiles sold in the US in 2006 and in 2007. 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?

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