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1. For each case below, choose the most appropriate statistical procedure:
a. A teacher of a low-level reading group is interested in what the average score is for the group of 25 students.b. An administrator wants to find out if there is a relationship between teacher absences and student achievement.c. A math teacher wants to know how many ability groups should be formed within a class of 30 students.d. A student teacher is interested in finding out the number of students who rate his performance as good, excellent, average, or poor.
Determine whether the method of delivering teaching influences adherence with antiretroviral therapy.
Identify the null and alternative hypothesis, test statistics, p-value or critical value(s), conclusion about the null hypotesis and final conclusion that address the original claim.
A PC manufacturer claims that no more than 2% of their machines are defective. In a random sample of 100 machines, it is found that 5% are defective. The manufacturer claims this is a fluke of the sample.
A study was conducted to determine whether there were significant differences between medical students admitted through special programs (such as affirmative action) and medical students admitted through regular criteria.
A sample of 20 cables is selected and tested. Find the sample mean that will cut off the upper 95% of all samples of size 20 taken from the population.
Explain how the power of a hypothesis test is influenced by each of the following. Assume that all other factors are held constant.
Suppose you study a random sample of 100 GRE verbal exams. Consider your a sketch of the sampling distribution of sample means and the appropriate calculation model.
What is the answer to the following unsorted data shows the number of traffic tickets given each day by Deputy Fife over the last eleven days.
The goal is to get people thinking about how they can actually use correlation and regression in their real life, and where and how can they can really benefit from these techniques?
In the past few years out sourcing over seas has become more frequently used than before by U.S. companies. However, out souring is not with out problems. A recent survey indicates that 20% of the companies that outsource over seas use consultant.
Determine the probability that adult owns stock and has some college education? Determine the probability that adult owns stock or has some college education?
Using a separate 2 by 2 table, compute predictive value positive and predictive value negative for population of 1,000 drug users.
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