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Consider again the study of the association between depression and cardiac disease survivability, which showed that of the 361 patients with no depression, 67 died. Of the 89 patients with minor or major depression, 26 died.
1. Create a 95% confidence interval for the difference in survival rates.
2. Interpret your interval in this context.
construct a frequency distribution table and describe the shape of the distribution, what score identifies the center for the distribution and are the scores clustered or spread across the scale?
John earned a score of 89 on both exams. On which exam did John receive the higher letter grade? What was the minimum exam score required for a B in Statistics? What was the minimum exam score required for a B in Psychology?
a -0.947 correlation coefficient has been found between two variables after examining 43 pairs of observations. what
Suppose that patrons of a restaurant were asked whether they preferred beer or whether they preferred wine. 70% said that they preferred beer. 60% of the patrons were male. 80% of the males preferred beer.
a publisher has discovered that the number of words contained in a new manuscript is normally distributed with ? 20000
question a research firm conducted a survey to determine the mean amount smokers spend on cigarettes during a week. a
A description of how you believe statistics can enrich and represent the results of a study, and an explanation of how statistics can be used to misrepresent the results of a study.
Jasmine is an African American graduate student. She is conducting research on the effects that affirmative action programs have had on American corporations.
Describe the distribution of sample means (shape, expected value, and standard error) for samples of n=36 selected from a population with a mean of µ=100 and a standard deviation of σ=12.
A researcher predicts that watching a film on institutionalization will change students' attitudes about chronically mentally ill patients.
Determine the probability that sample mean is between 7.5 and 8 minutes?
The average weight of adult men is 172 pounds with a standard deviation of 29 pounds. 30 men were asked their weight and the mean was calculated to be 181, test the hypothesis that the mean is not 172 pounds using alpha = .05.
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