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What data analysis methods were used in the article Napping on the nightshift: a two hospital implementation project
How do we use a least squares regression line? What is the range for the coefficient of determination?
An investor estimates that there is a 1 in 10 chance that a stock purchase will lose 20% of its value, a 2 in 10 chance it will break even, a 4 in 10 chance it will gain 15% and 3 in 10 chance it will gain 30%. What is the expected return.
Create and interpret a 95% confidence interval for the slope of the true relationship.
Is the standardized beta coefficient, the unstandardized beta coefficient, or both a reliable estimate to identify the relative contribution of each factor?
Find the evaluation score confidence intervals for the following two departments: Department 1 and Department 4 combined. Find the confidence interval at the 95% level. Use s = 6.06 and the mean 17.625.
You listen to radio station for 1 hour, at arbitrarily selected time, and carefully observe that amount of advertising time is equal to 7 minutes. Compute z-score for this amount of advertising time.
How many would you expect to say that CFCs are not the main cause of the greenhouse effect, assuming the percentage remained the same?
Create a model that would be appropriate for that task, and make the estimate.- The wrong answer from the other model is fairly accurate in this case. Why?
research shows that the life time of everlast automobile tires is normally distributed with a mean value of 70000
Test the null hypothesis that the two groups of children consume equal amounts of sweetened drinks versus the two-sided alternative.
Suppose your analysis produced F 2.56 with 5, 75 df. How many treatment groups are in your experiment? What are the critical values for the .05 and .01 levels? What conclusion should you reach?
Develop a likelihood ratio test to test H0 : µ = µ0 vs. Ha : µ = µ0 when our model is X iid ~ Norm(µ, 1).
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