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A clinical trial was conducted to test the effectiveness of the drug zipiclone for treating insomnia in older subjects. Before treatment with zipiclone, 16 subjects had a mean wake up time of 102.8 min. After treatment with zoplicone, the 16 subjects had a mean wake up time of 98.9 min and a standard deviation of 42.3 min (based on data from cognitive behavioral therapy vs Zopiclone for treatment of chronic primary insomnia in older adults by Siversten et al., journal of the American medical association, vol 295, no 24). Assume that the 16 sample values appear to be from a normally distributed population and construct a 98% confidence interval estimate of the mean wake time for a poplulation with Zopiclone treatments. What does the result suggest about the mean wake time of 102.8 min before the treatment? Does Zopiclone appear to be effective?
Give critical test statistic and compute sample test statistic. Test null hypothesis at alpha level .01.
an urn contains 7 red marbles and 3 white marbles. three marbles are drawn from the urn one after the other. find the
current research indicates that the distribution of the life expectancies of a certain protozoan is normal with a mean
1.Find a peer-reviewed article that provides an example of a study where the researchers utilized linear regression. Briefly describe the study and discuss its findings in your own words.
Compute the Kappa statistic and its standard error regarding reproducibility of the diagnosis of dyspnea in the clinic.
You have the lab analyze the number of calories in each of the hot dog samples with the results below. What conclusions can you draw concerning the calorie content of the two types of hot dogs?
A pair of dice is rolled. What is the probability of each of the following? (Round your answers to three decimal places.)
last year a soft drink manufacturer had 21 of the market. in an effort to increase their portion of the market the
the ceo of a software company is committed to expanding the proportion of highly qualified women in the organizations
If the 95% confidence interval for the average age of a learner at Capella is 27.8 yrs.
If the standard deviation of the population is 9 hours, determine whether there has been a significant increase in battery life expectancy.
in one area of an orchard there are 17 trees of which 10 are busy and 7 are lean. if 4 trees are randomly selected for
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