Advanced Placement (AP), 19.12.2020 03:20 lasagnafoe
A researcher would like to study the relationship between average fuel economy (measured in miles per
gallon) and fuel type (premium, regular unleaded, and E85). He randomly selects 90 vehicles of various
makes and models, including compact cars, full-size cars, and trucks. All of the selected vehicles have
been driven less than 6,000 miles before the experiment.
a) Does this experiment use a control group? Explain.
b) Suppose the researcher would like to use a completely randomized design. Explain how the
researcher should assign the 90 vehicles to the three fuel types.
c) An advisor to the researcher suggests using a randomized block design. Should the researcher
block on type of vehicle (compact cars, full-size cars, and trucks) or number of miles previously
driven (0–2,000 miles; 2,000–4,000 miles; and 4,000–6,000 miles)? Explain your choice of
blocking variable.
Answers: 3
Advanced Placement (AP), 23.06.2019 17:00
Read this scenario: a group of immigrant farmworkers forms an interest group to argue for workers' rights in their state. they cannot afford an experienced lobbyist, however, and are unable to secure meetings with important lawmakers. which negative aspect of interest groups does the scenario illustrate? a. lacking power without funding b. supporting candidates who may not be the best choice for a position c. focusing only on group members' goals d. resorting to unethical tactics
Answers: 1
Advanced Placement (AP), 24.06.2019 15:30
B. speculate about one positive way and one negative way that this boundary has affected the geographical units it separates over time.
Answers: 1
Advanced Placement (AP), 25.06.2019 00:00
Which is a type of tectonic plate boundary?
Answers: 2
Advanced Placement (AP), 25.06.2019 19:30
Ben can’t wrestle in this week’s match unless he loses two pounds. he decides to take a nap instead of exercising. this is an example of wasting time getting distracted allowing others to set goals
Answers: 1
A researcher would like to study the relationship between average fuel economy (measured in miles pe...
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