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Plasma glucose levels are used to determine the presence of diabetes. Suppose the mean in (plasma-glucose) concentration (mg/dL) in 35-44 year olds is 4.86 with standard deviation = 0.54. A study of 100 sedentary people in this age group is planned to test whether they have a higher or lower level of plasma glucose then the general population.
If the expected difference is 0.10 units, then what is the power of such a study if a two-sided test is to be used with a=.05. How many people would need to be studied to have 80% power under these assumptions?
Which option produces the smallest risk of a Type I error?
Draw a ball from number 1: if red go to number 2; if black go to number 3. What is probability
In this problem I am having an issue trying to determine what equation to use to solve. Is this a one or two way ANOVA or should I just use a z-test to solve?
Illustrate what decision should be made depended on the mini-max regret criterion. Decision based on the Mini-max criterion.
Consider a hypothesis test of H0: μ = 0 against H1: μ > 0 where μ is the mean percent change in total body bone mineral content of young women. The population standard deviation is σ = 2. The level of significance for the test is α = 0.05.
The means appear to be very close, but not the variances. At α = .05, is there a difference in variances? Show all steps clearly, including an illustration of the decision rule.
The statistical research was done primarily through the internet from governmental regulated sources. Estimates were used in consideration of absence of actual information.
What are the advantages and disadvantages of regression models in comparison to using a computerized regression routine? Give examples.
An experiment was conducted to compare the effects of two teaching styles for grade 12 mathematics. the individuals in experiment were grade 12 math students from one particular high school.
Determine the 95% confidence interval for the population mean, based on the sample mean.
Compute the variance and standard deviation of the number that will arrive within two days.
A scatter plot and regression line can be used for all of the following EXCEPT
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