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A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of u = 112 and a standard deviation of o = 33. The researcher expects a 22-point treatment effect and plans to use a one-tailed hypothesis test with alpha = .05. For all parts below, explain logic, show all formulas, include all steps and plug in the numbers (show all work).
a. Compute the power of the test if the researcher uses a sample of n = 33 individuals.
b. Compute the power of the test if the researcher uses a sample of n = 68 individuals.
Find that the student from class A is a fair student whereas the student from class B is a poor student, what is the probability that class A is the superior class?
in the binomial probability distribution let the number of trials be n 3 and let the probability of success be p
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank-sum test, evaluate the significance of the results, assuming there are no ties.
The estimated salary range is $4,500, the margin of error should be $100 and the desired level of confidence is 95%.
Bob compares his SAT Verbal score of 400 to Marge's ACT Verbal score of 20. "I beat you," he exclaims. "My score is 20 times your score!" Although his multiplication is good, his logic is faulty. Explain why.
A manufacturer of car batteries claims that his batteries will last, on average, 3 years with a variance of 1 year. If 5 of these batteries have lifetimes of 1.9, 2.4, 3.0, 3.5, and 4.2 years
suppose that a player is a 75 shooter in the first throw and a 80 shooter in the second if the first one is scored but
Determine the probability that exactly 8 of them started smoking before 18 years of age.
a simple random sample of 49 8th graders at a large suburban middle school indicated that 82 of them are involved with
Assume that company A makes 80% of all electrocardiograph machines, company B make 15% of them, and the company C makes the other 5%.
State the null hypothesis and alternative hypothesis. Indicate the type of test to be performed (left-tailed, right-tailed, or two tailed). Provide a statement in terms of the hypothesis testing process in this problem that would signify a Type I ..
what is the probability that he will prefer A, as a function of a and b? 3. Under what conditions on a and b will this probability exceed 0.8?
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