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A study seeks to compare hospitals based on the performance of their intensive care units. The dependent variable is the mortality ratio, the ratio of the number of deaths over the predicted number of deaths based on the condition of the patients. The comparison will be between hospitals with nurse staf ng problems and hospitals without such prob- lems. Assume, based on past experience, that the standard deviation of the mortality ratio will be around .2 in both types of hospital. How many of each type of hospital should be included in the study in order to have both the type I and type II error probabilities be .05, if the true difference of mean mortality ratio for the two types of hospital is .2? If we conclude that hospitals with nurse staf ng prob- lems have a higher mortality ratio, does this imply a causal relationship? Explain.
Assuming that these are a random sample of all publicly traded companies, construct a 95% confidence interval for the overall noncompliance proportion.
Is there a group homomorphism $:S4 -> A4, with kernel $ = {e, (1 2)(3 4), (1 3)(2 4), (1 4)(2 3)}?
Describe the target population, sampling frame, sampling unit, and observation unit. Discuss any possible sources of selection bias or inaccuracy of responses.
In1990, 5.8% ofjob applicants whowere testedfor drugsfailed thetest.
a in the psychology department there are 5 golden retrivers 2 german shepaherds and one pug dog. which measure of
Given 7 male individuals in a Physical Education course, the number of sit ups each individual can do in a one minute period was recorded:
a what is the interpretation of the intercept in regressions 1 and 2? is the intercept meaningful?b please
Should mean disposable income be used to predict sales based on the sample of 14 Sunflower stores? Are there any other factors not mentioned by the leasing agents that might be relevant to the store leasing decision?
ambulance response time is measured as the time in minutes between the initial call to emergency medical services ems
Professor wishes to determine whether prior statistical knowledge assists students in their performance on the final exam. What is the relationship between pretest scores and final exam scores after controlling for cumulative GPA. What SPSS test w..
suppose the data represent the inches of rainfall in april for a certain city over the course of 20 years.a determine
1 suppose xberp and yber q with 0ltplt1 0ltqlt1 and let x y be independent. determine the pmf for xy.2 suppose we have
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