Question 1

In the early 19th century,the Russian government sent doctors to southern Russian villages to provide assistance during a cholera epidemic.The villagers noticed that wherever doctors appeared,people died.Therefore,many doctors were chased away from villages,and some were even killed.This reaction to the correlation between doctors and deaths is most likely a problem of

Accepted Answer

The situation described suggests that people were dying regardless of the presence of doctors, and the correlation between doctors and deaths was a coincidence, making it a case of reverse causality.

Question 2

Suppose that someone makes the argument that because empty alcohol containers are found at many accidents,the containers cause accidents.This would be an example of

Accepted Answer

The answer of Suppose that someone makes the argument that...

Question 3

Bill has noticed that increases in unemployment insurance claims are associated with recessions,and therefore he advocates limits on unemployment insurance so as to prevent recessions.Martha has noticed that most drug addicts once attended schools,and therefore she advocates getting rid of schools so as to prevent drug addiction.

Accepted Answer

Both Bill and Martha are incorrectly assuming causation from correlation without considering other variables that may influence the outcomes.

Question 4

A relatively flat demand curve indicates that

Accepted Answer

The answer of A relatively flat demand curve indicates that
...

Question 5

The slope of a fairly flat upward-sloping line will be a

Accepted Answer

A fairly flat upward-sloping line implies that the slope is not too steep, so it would be a small positive number.

Question 6

The slope of a steep upward-sloping line will be a

Accepted Answer

A steep upward-sloping line will have a large positive slope because it rises quickly over the horizontal axis.

Question 7

The slope of a line that passes through the points (15,10)and (7,30)is

Accepted Answer

Using the formula for slope, we get:
slope = (change in y) / (change in x)
slope = (y2 - y1) / (x2 - x1)
slope = (30 - 10) / (7 - 15)
slope = 20 / (-8)
slope = -5/2
Therefore, the slope of the line passing through (15,10) and (7,30) is -5/2.

Question 8

A relatively steep demand curve indicates that

Accepted Answer

The answer of A relatively steep demand curve indicates that
...

Question 9

The slope of a line that passes through the points (10,15)and (20,7)is

Accepted Answer

The slope of a line passing through two points $(x_1,y_1)$ and $(x_2,y_2)$ is given by:
$$\frac{y_2-y_1}{x_2-x_1}$$
Using this formula and plugging in the given values, we get:
$$\frac{7-15}{20-10}=\frac{-8}{10}=-\frac{4}{5}$$
Thus, the slope of the line passing through the given points is $-\frac{4}{5}$. Therefore, the answer is choice B.

Question 10

Which of the following is not correct?

Accepted Answer

The answer of Which of the following is not correct?
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Question 11

Which of the following is correct?

Accepted Answer

A horizontal line has a constant y-coordinate and therefore has a change of 0 in y for any change in x, making the slope 0. A vertical line has a constant x-coordinate and any change in y results in an infinitely large change in x, making the slope undefined or infinite.

Quiz 2: Thinking Like an Economist