Question 1

Professor Macro wants to use a numerical graph to show the percentage of government spending accounted for by its various components. Which of the following graphs is most suitable for this purpose?

Accepted Answer

The answer of Professor Macro wants to use a numerical...

Question 2

A positive relationship between swimsuits purchased and ice cream purchased could be the result of:

Accepted Answer

There is likely an omitted variable, such as the external temperature, that is driving both the purchasing of swimsuits and ice cream. As the temperature increases, people are likely to purchase more swimsuits as well as more ice cream, which could explain the positive relationship between the two variables.

Question 3

Use the following to answer questions:
Figure: Consumption of Pizza and Tacos 
-(Figure: Consumption of Pizza and Tacos) Look at the figure Consumption of Pizza and Tacos. The figure shows the number of tacos and pizza slices Matt can eat in a day. The best estimate of the slope between point A and point B is -4.

Accepted Answer

The answer of Use the following to answer questions:
Figure: Consumption...

Question 4

Taylor sees a bar graph showing the average weight of adult males over the past 200 years and concludes that men get more obese over time. Taylor's conclusion may be wrong, since she did not consider:

Accepted Answer

Taylor did not consider other factors that could affect average weight, such as changes in diet, physical activity, and access to healthcare. Without controlling for these variables, Taylor cannot conclude that the increase in weight is solely due to obesity. This is an example of omitted variable bias.

Question 5

Use the following to answer questions:
Figure: Unemployment Rate over Time 
-(Figure: Unemployment Rate over Time) Look at the figure Unemployment Rate over Time. In the time-series graph, as we move from 1993 to 1995, we see that the unemployment rate has _____ from approximately _____ to approximately _____.

Accepted Answer

The answer of Use the following to answer questions:
Figure: Unemployment...

Question 6

The owner of the Dismal Philosopher, one of five bookstores on College Road, asks you to make a graph showing each College Road bookstore's share of all five stores' book purchases. The best way to show this information is with:

Accepted Answer

A pie chart is the best way to show the share of book purchases for each of the five bookstores on College Road as it allows for a clear and easy-to-understand breakdown of each store's percentage of total purchases. A scatter diagram, time-series graph, or independent graph would not be as effective for this type of data.

Question 7

The owner of the Dismal Philosopher, one of the five bookstores on College Road, asks you to make a graph showing each College Road bookstore's share of all five stores' book purchases. A good way to show this information is with a pie chart.

Accepted Answer

A pie chart would be a good way to visually represent the proportion of book purchases made by each of the five bookstores on College Road. It would allow the owner of the Dismal Philosopher to easily compare their store's share of purchases to those of their competitors.

Question 8

A scatter diagram shows:

Accepted Answer

A scatter diagram shows individual points of data showing both variable values. It is used to visually represent the relationship between two variables. The distance between the points does not provide information on how far apart dependent variables are, the slope of a line or the intercept of a curve.

Question 9

A bar graph:

Accepted Answer

A bar graph shows the relative amounts attributable to different categories and may be shown by either vertical bars or horizontal bars to illustrate the comparative sizes of different observations. Therefore, the best choice is D.

Question 10

Use the following to answer questions:
Figure: Unemployment Rate over Time 
-(Figure: Unemployment Rate over Time) Look at the figure Unemployment Rate over Time. In the time-series graph, as we move from 1997 to 2001, we see that the unemployment rate has _____ from approximately _____ to approximately _____.

Accepted Answer

The answer of Use the following to answer questions:
Figure: Unemployment...

Question 11

The scaling of the axes of a time-series graph:

Accepted Answer

The scaling of the axes can greatly impact how the data is interpreted. For example, if the y-axis is scaled from 0 to 100 instead of 0 to 10, a small change in the data can appear much larger than it actually is. It is important to carefully consider the scaling of the axes in order to accurately present the data.

Question 12

Use the following to answer questions:
Figure: Unemployment Rate over Time 
-(Figure: Unemployment Rate over Time) Look at the figure Unemployment Rate over Time. In the time-series graph, as we move from 1991 to 1993, we see that the unemployment rate has _____ from approximately _____ to approximately _____.

Accepted Answer

In the graph, as we move from 1991 to 1993, we see that the unemployment rate has increased from approximately 5.5% to approximately 7%. Therefore, option B is the correct choice. None of the other options match the trend shown in the graph. Option A and C both show a decrease in unemployment rate, which is not what is shown in the graph. Option D shows a decrease followed by an increase, whereas the graph only shows an increase.

Question 13

A pie chart is used to depict information about:

Accepted Answer

A pie chart is specifically designed to show the proportions or percentages of different categories within a dataset, making it the best choice for depicting relative shares of data. It is not designed to show changes over time or relationships between variables.

Question 14

In looking at a chart of the positive relationship between police officers and crime, the mayor remarks that more police officers cause more crime. The mayor may be wrong because she did not consider:

Accepted Answer

The answer of In looking at a chart of the...

Question 15

Use the following to answer questions:
Figure: Consumption of Pizza and Tacos 
-(Figure: Consumption of Pizza and Tacos) Look at the figure Consumption of Pizza and Tacos. The figure shows the number of tacos and pizza slices Matt can eat in a day. The relation is nonlinear, and there is a negative relation between the number of tacos and pizza slices that Matt can eat in a day.

Accepted Answer

The figure shows a nonlinear negative relation between the consumption of pizza and tacos by Matt.

Question 16

A ______ graph shows how the value of one or more variables has changed over some period.

Accepted Answer

A time-series graph is specifically designed to show changes in one or more variables over time. Linear and nonlinear graphs can also show change, but they do not necessarily focus on the element of time. A periodic table is not relevant to showing changes in values over time.

Question 17

Use the following to answer questions:
Figure: Unemployment Rate over Time 
-(Figure: Unemployment Rate over Time) Look at the figure Unemployment Rate over Time. In the time-series graph, as we move from the beginning of 2001 to the beginning of 2003, we see that the unemployment rate has _____ from approximately _____ to approximately _____.

Accepted Answer

The answer of Use the following to answer questions:
Figure: Unemployment...

Question 18

In a time-series graph, large changes can be made to appear trivial by:

Accepted Answer

Changing the scale of the axes can make large changes appear small, or small changes appear large. This is because the scale determines the range of values displayed on the graph. If the scale is widened or narrowed, it can change the perception of the magnitude of the changes being displayed. Labeling more intervals or defining the variables does not have as direct an impact on how changes are perceived in a time-series graph.

Question 19

A linear curve has the same slope between every pair of points.

Accepted Answer

A linear curve has a constant slope between any two points.

Question 20

The fact that two variables always move together over time:

Accepted Answer

The fact that two variables always move together over time does not necessarily mean that one variable causes the changes in the other (proven by researching and eliminating other possible explanations). Therefore, it cannot be conclusively proven that one variable is dependent on the other.

Quiz 2: Economic Models: Trade-Offs and Trade 25

Professor Macro wants to use a numerical graph to show the percentage of government spending accounted for by its various components. Which of the following graphs is most suitable for this purpose?

A positive relationship between swimsuits purchased and ice cream purchased could be the result of:

Taylor sees a bar graph showing the average weight of adult males over the past 200 years and concludes that men get more obese over time. Taylor's conclusion may be wrong, since she did not consider:

The owner of the Dismal Philosopher, one of five bookstores on College Road, asks you to make a graph showing each College Road bookstore's share of all five stores' book purchases. The best way to show this information is with:

The owner of the Dismal Philosopher, one of the five bookstores on College Road, asks you to make a graph showing each College Road bookstore's share of all five stores' book purchases. A good way to show this information is with a pie chart.

A scatter diagram shows:

A bar graph:

The scaling of the axes of a time-series graph:

A pie chart is used to depict information about:

In looking at a chart of the positive relationship between police officers and crime, the mayor remarks that more police officers cause more crime. The mayor may be wrong because she did not consider:

A ______ graph shows how the value of one or more variables has changed over some period.

In a time-series graph, large changes can be made to appear trivial by:

A linear curve has the same slope between every pair of points.

The fact that two variables always move together over time: