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For the research scenarios in parts (a) and (b), explain whether a randomized experiment could be used.
a. To compare two programs to reduce the number of commuters who drive to work: providing discount coupons for the bus, or providing shuttle service for people who need to run errands during the workday.
b. To study the relationship between age and opinion about whether marijuana should be legal.
c. For each of parts (a) and (b) of this exercise, state the explanatory variable and the response variable.
d. For each of parts (a) and (b) of this exercise, give an explanation of a possible confounding variable that could be present if an observational study were done.
The Pentel Microchip Company has started production of its new microchip. The first phase in this production is the wafer fabrication process. Because of the great difficulty in fabricating acceptable wafers, many of these tiny wafers must be reje..
A sample of 15 items is placed on test with the eight failures occurring at the following times (in hours): 400, 430, 435, 460, 460, 490, 520, 530. Based on Handbook H-108, should the lot be accepted?
At the 0.01 level of significance, does the machine appear to be in need of maintenance and calibration? Determine and interpret the p-value for the test.
a spymaster has a network of 7 operatives whom he pays out of a slush fund containing 20000. for accounting reasons his
Describe the goal of an experimental research study and identify the two elements that are necessary for an experiment to achieve its goal.
When 40 people used the Weight Watchers diet for one year, their weight losses had a standard deviation of 4.9 lb (based on data from "Comparision of the Atkins, Ornish, Weight Watchers, abd Zone Diets for Weight Loss and Heart Disease Reduction, ..
The possible responses were "Democrat", "Republican", "Independent", "Other", and No Response . What kind of variable is the response?
What are the respective sample means on "feelsafe" (Importance of Safety) for males and females from the SPSS Tables Set-1, when visiting a sports bar?
Explain in language that the manager can understand why we cannot be confident that sales rose by 6%, and that in fact sales may even have dropped.
suppose that 12 observations are drawn from a normal population. the observations are 15 912 11 8 12 11 7 15 9 6 and
Which of the following would have a binomial distribution and evaluate the binomial coefficient
How did the federal government shape the lives of U.S. citizens in the period from 1865 through the time of industrialization and urbanization?
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