A research project is conducted by offering a randomly selected 300 of the 500 local Toyota Prius owners a chance to use a new fuel additive for 6 months to see if their gas mileage improves. 225 of the 300 randomly selected Prius owners agree to the offer, 50 of those drop out of the project after 1 month, another 50 drop out after 2 months, and 25 more drop out after 3 months. The rest remain for the duration of the project. Using the intention to treat method, the results from how many of the Prius owners who were randomly selected should be included in the research project?
A. 100
B. 200
C. 225
D. 300
Answer: D
You might also like to view...
Entry and exit continue in monopolistic competition until the remaining firms are
A) earning an economic profit. B) incurring an economic loss. C) earning less than a normal profit. D) earning zero economic profit. E) producing the normal amount of product differentiation.
Over time in a growing economy, the long-run aggregate supply curve will
A) become horizontal at the long-run potential price level. B) shift rightward. C) shift leftward. D) become increasingly steep.
The potential for a decline in product quality due to asymmetric information is commonly referred to as
A) the lemons problem. B) planned obsolescence. C) diminishing marginal product. D) the externality problem.
The economic way of thinking is
a. a set of historical generalizations that indicates what goods should be produced. b. a body of statistical data that indicates how an economy should be organized. c. a set of basic concepts that helps one understand human choices. d. a set of complex, highly abstract theories that provides persons skilled in statistics with the information necessary to tell others what choices they should make.