Refer to the information provided in Scenario 22.4 below to answer the question(s) that follow.SCENARIO 22.4: In a randomized 1-year trial of 400 Mr. Lincoln hybrid tea rose bushes with rose rosette disease, 200 are slated to receive only a sulphur treatment (we will call this Group A), and the other 200 are slated to receive the sulphur treatment and an additional neem oil treatment 4 months later (we will call this Group B). Assume that the neem oil treatment is ineffective in treating rose rosette disease, so on average, the same proportion of rose bushes in each group will die of the disease. In Group B, 25 of the 200 rose bushes die in the 4-month period leading up to the neem oil treatment. Of the 175 bushes left, 25 die in the 8 months following the neem oil treatment. Since we
know the neem oil treatment is ineffective, the rose bushes in Group A will, on average, suffer the same fate as those in Group B, with 25 bushes dying in the first 4 months and another 25 dying in the following 8 months.Related to the Economics in Practice on p. 727: Randomly granting vouchers by the Department of Housing and Urban Development was an effort to avoid the
A. selection bias.
B. substitution bias.
C. location bias problem.
D. income bias.
Answer: A
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Which of the following would be directly counted in U.S. GDP for 2015?
A) a 2015 Mini Cooper, built in Oxford, England, and sold to a computer programmer in San Jose, California B) a 1957 Chevy Bel Air convertible sold by its original owner to a car collector in Nashville on March 1, 2015 C) a 2015 Harley-Davidson Softail Deluxe, built in Pennsylvania, and sold to a kindergarten teacher in Moose Jaw, Saskatchewan, Canada D) a Tesla car battery, built in 2014 in California, to be installed in a new 2015 Tesla Model S
Of the following Asian countries, which has the lowest level of real GDP per person?
A) China B) Korea C) Singapore D) Hong Kong
A federal government deficit is said to exist in the event that ________
A) federal outlays are less than federal revenues B) federal outlays are equal to federal revenues C) federal outlays are greater than federal revenues D) any of the above conditions exists
A firm has $350 million in revenues and explicit costs of $150 million. If its owners have invested $150 million in the company at an opportunity cost of 10 percent a year, the firm's economic profit is: a. $50 million
b. $150 million. c. $185 million. d. $200 million.