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1. Epidemiology, a fundamental discipline in public health, has many applica- tions in the health sciences.
a. Name three types of epidemiologic study designs.
b. What types of problems can we address with them? 2. Suppose a health research institute is conducting an experiment to determine whether a computerized, self-instructional module can aid in smoking cessa- tion.
a. Propose a research question that would be relevant to this experiment.
b. Is there an independent variable (exposure factor) in the institute's experi- ment?
c. How should the subjects be assigned to the treatment and control groups in order to minimize bias?
How is data screening related to the assumptions of the statistic you will choose to analyze your data?
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when we look at the null hypothesis and the alternative hypothesis represent two contradictory statements. they are
If you are ask to minimize shipment cost, how much product should you ship from each Factoryto each Outlet.
consider the following frequency distribution for a sample of 40 observationsclass frequency0-4
determine the point estimate of the population proportion the margin of error for the following confidence interval and
Test the claim by random sampling 60 hgh school boys. Researcher found 54 boys have a cell phone at a = 0.01. Should the claim be rejected?
Both intervals were calculated from the same sample data. The confidence level for one of these intervals is 90% and for the other is 99%. Which of the intervals has the 90% confidence level, and why?
The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35, and the sample statistics includen=1028 subjects with 350 saying that they smoked a cigarette in the past week. Find the value of the test statis..
1. how do correlation coefficients summarize the information in scatter-plot? what do scatter-plots reveal that
Any analysis required to check the required conditions (note that if you find that you cannot meet the required conditions for the test you expected to do, you must use the appropriate non-parametric test)
paris arlines wants to estimate the average number of flights pet year for its crews. a quick pilot study found the
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