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For a multiway contingency table, when is a logistic model more appropriate than a loglinear model, and when is a loglinear model more appropriate?
when taking an exam some students quickly answer all the questions they know how to do. if they go back and revise
An advertisement for Cold-Ex claims an 80 percent end-of-treatment clinical success rate for the treatment of flu. Twelve flu patients are given Cold-Ex and are later checked to see if the treatment was successful. Let's assume that the claim ..
This linear regression model was fitted to a sample of size 50 to produce the following regression equation: yhat = 145 + 1.2x1 + 300x2.
The National Survey of Student Engagement found that 87% of students report that their peers at least "sometimes" copy information from the Internet in their papers without reporting the source.12 Assume that the sample size is 430,000.
Regression and Correlation are two of the most often used and abused tools in research. People are quick to jump to conclusions that if a relationship exists between two variables, then one must cause (causation) the other. There are many reasons ..
We have already been introduced to sensitivity analysis via the geometry of a simple example. We saw that the values of the decision variables and those of the slack and surplus variables remain unchanged even though some coefficients in the objec..
A pn junction operating in the forward-bias region with a current I of 1 mA is found to have a diffusion capacitance of 5 pF. What diffusion capacitance do you expect this junction to have at I = 0.1 mA? What is the mean transit time for this junc..
a restaurant claims that the standard deviation in the lenght of serving times is less than 2.9 minutes. a random
Standard deviation of 50. what is the probability that next year the number of burgalaries will be less than 250? less than 300 and more than 350?
Finds the standard deviation of the time to prepare, copy and mail their tax return is 80 minutes. What is the standard error of the mean in this example?
I'm trying to determine what happens to the sample size if the level of confidence is reduced from 95% to 90% but the allowable error and the standard deviation remain
A random group of 12 high school juniors were asked to estimate the average number of hours they study each week. The following give these hours along with the student's grade point average-Find the sample correlation coefficient between hours repo..
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