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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.
which statement is true about the scope of systematic reviews srs?a. srs should be as broad as possibleb. srs should be
What is the independent variable (x-values)? What is the dependent variable (y-values)? What is the equation for the line of best fit that is determined using the Microsoft Excel Regression Analysis tool on the data
If a gambler rolls two dice and gets a sum of four, he wins $10; and if he gets a sum of three, he wins $25. The cost to play the game is $5. What is the expectation of this game?
sample surveys conducted in a large county in a certain year and again 20 years later showed that originally the
Range from 5 to 30 rounds. Rounds.) Insert a 10 round.. Does this make it a different firearm?? You add the single shot rifle round adapter to it?? Different gun, based just on the magazine capacity (now 1)??
Find a 98% confidence interval for the true mean. Assume that the account balances are normally distributed.
Graphical method to solveout the linear programming problem. Describe where the following TEO constraints intersect.
Find the difference between the actual y value and the predicted y value for each individual, square the differences and add the squared values to obtain ss residual.
1. Develop the appropriate research questions and/or hypothesis for the main effects and interaction.
What is the 95% confidence interval for the mean number of microwaves sold at retail store in the chain last week?
What statistical method is used to accept or reject the null hypothesis in determining if outsourcing is always beneficial? Please explain your reasons for choosing the selected method in detail and cite references (if any).
The average weight of adult men is 172 pounds with a standard deviation of 29 pounds. 30 men were asked their weight and the mean was calculated to be 181, test the hypothesis that the mean is not 172 pounds using alpha = .05.
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