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A bank asks customers to evaluate the drive-through service as good, average, or poor. Which level of measurement does this classification illustrate?
Support your contention with three examples from your experience at other organizations or departments. Where applicable, for each example, indicate what are the treatments and blocking variables.
Determine whether the method of delivering teaching influences adherence with antiretroviral therapy.
When there are multiple observations per subject, what issues are there with doing a MNL and an ordered logit model, answer in detail and provide example.
Assume you have drawn a simple random sample of 10 students from a college campus and recorded how many hours each student studies (X) during the ¯rst week of December, 2009. Results:
How large sample should be selected in order to obtain p estimate with a bound of 0.08 on the error of estimation.
Find the value of W, the test statistic for a two sample rank-sum test that would compare the two methods for losing weight. Give the details of how you found W. Please show your step-by-step hand calculation here.
Is the z value positive or negative? Explain why it should be positive or negative.
Explain what the coefficient of determination, R^2 (R-squared), measures. How is it related to the sample correlation coefficient?
We wish to know if, on the basis of these data, we may conclude that the mean systolic blood pressure for a population of African-American men is greater than 140.
Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
Jolly Blue Giant Health Insurance is concerned about rising lab test costs and would like to know. Determine the essential sample size?
Sketch the distribution of sample means for sample of n = 25 scores from this population.
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