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1. What are quasi-experimental research designs, and when are they used in behavioral research? What advantages and disadvantages do they have in comparison to experimental research?
2. What are the most important threats to validity that occur in quasi-experimental research designs when individuals are not randomly assigned to groups? What techniques can be used to minimize these potential interpretive problems?
students enrolled in an introductory statistics course at a university were asked to take a survey that indicated
suppose cattle in a large herd have a mean weight of 1337 lbs and a standard deviation of 64. what is the probability
The number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a standard deviation of 50. What is the probability that a student uses fewer than 400 minutes?
assume the probability that a newborn is a boy is 51 that is p 0.51. suppose a family has 8 children.a what is the
Ski Resorts of Vermont, Inc. is considering a merger with Gulf Shores, Inc. of Alabama. The board of directors surveyed 50 stockholders concerning their position on the merger.
a student has submitted a concrete cylinder to the strength contest in engineering open house. suppose the strength of
Suppose the p-value for these test is 0.03. Is the difference in percentages at a 5% level? Explain. Suppose the p-value for this test is 0.03. Is the difference in percentages significant at a 1% level? Explain. What is the overall (weighted) sample..
suppose a study estimated the population mean for a variable of interest using a 99 confidence interval. if the width
In our example of research on lipstick, where E = $2 and S = $29, what sample size would we require if we desired a 99 percent confidence level? What about if we keep the 95 percent confidence level, but decide that our acceptable error is $4?
The Cadet is a popular model of sport utility vehicle, known for its relatively high resale value. The bivariate data given below were taken from a sample of sixteen Cadets
Paul has calculated the indifference probability for the lottery having a payoff of $160K with probability p and -$80K with probability (1-p) as follows:
identify two important operating standards that are routinely measured in your organization. these measures must meet
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