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Does Sleep Deprivation Make You Fat? The American Journal of Clinical Nutrition (June 2011) suggested that reduction in sleep increases energy and fat intakes.
Is this likely to be a conclusion from observational studies or randomized experiments?
Can we conclude that sleeping less causes one to gain weight? Why or why not?
Seven employees who have formed a car pool. If only three of these employees can drive, how many possible seating arrangements are there for the group?
In a sample of 100 homes, local officials find that 14 had termites less than 1 year after being treated. At the 0.05 level of significance, evaluate the credibility of the exterminator's statement.
What was the highest point of the pope's power and what was the lowest point?
given two original random variables x and y suppose that we modify one of them by adding a constant w a x. how does
Assuming this is true, determine the expected spread in the number (i.e., mean ± 1 standard deviation) of home buyers (from sample of 20 home buyers) that will do some remodeling to their home within the first 5 years of home ownership.
The researchers claimed that of those who completed the program, 85% improved. What possible confounds can you identify in this study?
determine the present worth of a series of annual deposit of 1200 during years 5 through 14 and a series of withdrawals
in a poll of 600 randomly selected subjects 240 answered yes when asked if they planned to vote in a state election.
We want to test a claim that we have reduced the average wait time at our bank from year one to year two. We have a sample of 40 wait times from each year, but the average and standard deviations for each year are not known. Which statistical test..
Suppose you conduct a one-way betweensubjects ANOVA. Explain the meaning of the terms one-way and between-subjects.
A freeze in nuclear weapons should be favored because it would begin a much-needed process to stop everyone in the world from building nuclear weapons.
Describe a 5-step hypothesis test for two variances for a particular claim related to your work or life environment. You need to state the claim, define the null and alternate hypothesis, identify the test significance and the test statistic, and ..
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