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Does there seem to be any difference in the effects of the antibiotics on clearance of otitis media? Express your results in terms of relative risk (RR). Consider separated analyses for unilateral and bilateral cases. Also consider and analysis combining the two types of cases.
The cost accountant for Blue Pharmaceuticals has informed you that the company's materials quantity variance for the drug Allegro was exactly equal to its materials price variance for the year.
Model Fitness. With any statistical model, we assess the fit: Does the model accurately depict the truth? Explain how one of the following helps assess the "fitness" of the mean.
Describe appropriate treatment means μ1, μ2 and μ3. After that Test for statistically significant differences between these treatment means. Set α = 0.05.
A researcher plans to compare two treatment conditions by measuring one sample in treatment 1 and a second sample in treatment 2. The researcher will then compare the scores for the two treatments. If there is a difference between the two groups o..
Consider the following continuously operation job shop. Inter arrival times of jobs are described as follows: What is the average time for the 10 new jobs?
A local bank wants to install motion detector burglar alarms. Each has a 70% chance of detecting a burglar. If the bank wants to be 99% certain of detecting a burglar how many need to be installed?
Suppose that a certain college class contains 54 students. Of these, 34 are sophomores, 35 are psychology majors, and 7 are neither. A student is selected at random from the class.
Survey of 8000 women, 5431 say they change their nail polish once a week. construct a 95% confidence interval for the population proportion of women who change their nail polish once a week.
The consequences of the central limit theorem is that if we end up averaging the measurements of a particular quantity, the distribution of an average tends on going toward a normal one?
Describe what do you mean by terms 'false positive" and " false negative".
Based on surveys conducted in 1989 and 1999, a researcher compared the proportion of high school age females interested in a career in science in 1989 with the proportion in 1999. He concluded that the proportions were not significantly different ..
The number of items rejected daily by a manufacturer because of defect for the last 30 days are 22, 21, 8, 17, 25, 20, 18, 19, 14, 13, 11, 6, 21, 23, 4, 19, 11, 12, 16, 16, 10, 28, 24, 6, 21, 20, 25, 5, 17, 9. Complete this frequency table for the..
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