#1 The Hawthorne Works was a large Western Electric factory with 45,000 employee
ID: 2921650 • Letter: #
Question
#1 The Hawthorne Works was a large Western Electric factory with 45,000 employees. During the 1920s and 1930s Hawthorne Works was the site of some well-known industrial studies. In one of the studies, researchers investigated the impact of different working conditions on worker productivity. Prior to the start of the study, researchers secretly measured workers’ productivity for several weeks. Then researchers chose two workers, who then chose their own teams. The teams were separated from the general workforce and completed their work in different experiment rooms where the researchers could observe them more easily. Over a 5-year period researchers manipulated the structure of the workday for each team (number and duration of breaks and number of hours per shift). For each of these changes in working conditions, the researchers measured the effect on productivity. For some conditions, such as frequent short breaks, workers rebelled by intentionally decreasing productivity.
Which of the following features is used in the design of this experiment?
Check all that apply.
a)Single blinding
b)Control group
c)Random assignment
d)Direct control of confounding variables
e)Treatment group
#2 In generalizing from a sample, in order to achieve an error margin of plus or minus 3 percentage points at a confidence level of about 95 percent, what’s the smallest random sample we can get away with, regardless of the size of the population?
a.100 b. 500 c. 1000
#3 Julia sells exotic birds. She has placed four orders with wholesale bird supplier Papagayo Co., and all of them have been filled with healthy birds. Lately, however, some wholesale competitors have been trying to get her to order from them. But, when it’s time to make the next order, she decides she’s better off with Papagayo because she’s pretty sure she’ll get healthy birds. (Do not assume that you know anything about birds or the bird business.)
If Julia had placed seven orders with Papagayo with the same result, her argument would be:
a. Weaker
b. Stronger
Explanation / Answer
Q 1 Answer;
a)Single blinding
b)Control group
d)Direct control of confounding variables
e)Treatment group
Q 2. c) 1000
Q 3. Stronger
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