Refer to the information provided in Scenario 22.3 below to answer the question(s) that follow.SCENARIO 22.3: Consider a local high school that has 300 sophomores considered to be at-risk students. A privately-sponsored after-school sports program has been established to try to help at-risk students succeed in finishing high school. The local government wants to know if this program reduces the students' probability of dropping out of high school before the end of their junior year, and decides to randomly sample 150 of the 300 at-risk sophomores and invite them to attend the after-school program at no cost. 100 students accept the invitation, and by the end of their junior year, the drop-out percentage of the 100 students who attended the program was lower than the drop-out percentage of
the 200 students who did not attend the program. Refer to Scenario 22.3. Based on the information in the scenario, the 100 students who accepted the offer to attend the after-school program is an example of
A. positive correlation.
B. a random sample.
C. selection bias.
D. survivor bias.
Answer: C
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Homogeneous goods are ________
A) perfect complements B) perfect substitutes C) similar but not identical D) always inferior
As a result of the rightward shift in the demand curve for labor from LD0 to LD1, the equilibrium level of employment ________ and potential GDP ________
A) increases; increases B) increases; decreases C) decreases; increases D) decreases; decreases
When the level of unplanned inventory investment is equal to zero, the economy is
A) in disequilibrium. B) in a recession. C) in equilibrium. D) overheating
Refer to the data. Diminishing marginal returns become evident with the addition of the:
Answer the question on the basis of the following output data for a firm. Assume that the amounts of all nonlabor resources are fixed.
A. sixth worker.
B. fourth worker.
C. third worker.
D. second worker.