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Vertical banded gastroplasty is a surgical procedure that reduces the volume of the stomach in order to produce weight loss. In a recent stdy, 82 patients with Type 2 diabetes underwent this procedure, and 59 of them experienced a recovery from diabetes. At the 0.01 significance level, test the claim that a majority of those with type 2 diabetes who undergo this surgery will recover from diabtes.
A sample of 46 homes in a subdivision revealed that 20 were ranch style (as opposed to colonial, tri-level, or Cape Cod). Construct a 98 percent confidence interval for the true proportion of ranch style homes.
a researcher believes that women today weigh less than in previous years. to investigate this belief she randomly
Roper ASW conducted a survey to learn about American adults' attitudes toward money and happiness. 56% of respondents said they balance their checkbook at least once a month.
Determine the standard error of estimate. Suppose a large sample is selected (instead of just five). About 68 percent of the predictions would be between what two values?
Determine and report the within-group slope which relates Y to Xc (for this, you will have to look at your regression printout).
if 22 tickets are sold and 2 prizes are to be awarded find the probablilty that one person will win two prizes if that
correlation based on scatter plot.a manager wishes to find out whether there is a relationship between the number of
0.8 of all college students like the idea of a new curriculum. If we select 87 students (ASSUME INDEPENDENCE), what is the Standard Deviation of the Probability Distribution that would list the number of students.
Mean SAT score is computed for each sample. If the sample size is n=2,500, find the mean and standard deviation of the distribution of sample means.
A study is conducted to determine if time of day has any effect on test grades. An introductory psychology class is selected for the study, because it has a standard curriculum taught across many sections. Two classes are selected for each time perio..
a using exponential distribution estimate the average time using the sample mean.times1118022136011b using the previous
Wwho are also athletes but who are not regularly hit in the head. Is this an example of an experimental or nonexperimental study?
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