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An epidemiologist says that "randomization does not exclude confounding . . . confounding is very likely if information is collected-as it should be-on a sufficient number of baseline characteristics. . . ." Do you agree or disagree? Discuss briefly. Notes. "Baseline characteristics" are characteristics of subjects measured at the beginning of the study, i.e., just before randomization. The quote, slightly edited, is from Victora et al (2004).
Explain the concept of "Regression Analysis", its types (3 types at least), applications and usefulness. Provide real application of its usage. Some times, Maximum likelihood estimation is not applicable, Explain and provide an example?
Ppopulation with a mean of 240 and standard deviation of 18. Find the mean & standard deviation of sample distribution of the mean?
Students from the class for an oral exam, what is the probability that 3 female students and 5 male students will be selected?
every day for 100 days 72 samples were taken of fuses rated at 6a and measures the current that they burn out. a
If 49 applicants are randomly chosen, what is the probability that they will have a rating between 230 and 260? Round z scores to two decimal places.
suppose that your favorite cafe is considering introducing a decaf version of its house blend and is interested in
the life in hours of a computer processing unit cpu is modeled by a weibull distribution with parameters szlig 3 and d
What is a nonparametric procedure? Describe specifically when you would utilize a nonparametric test. Under what conditions should you use the Wilcoxon sum rank test?
What is the probability of randomly selecting a sample of 30 scores which has a mean attention span equal to or greater than 17 minutes.
The Focus sample contains information on the undergraduate students at the University of Wisconsin - Eau Claire (UWEC). Open the Focus sample worksheet (Focus Sample) and do the following.
A regression of attitude toward legalizing marijuana on age (X1) and education (X2) produced the following estimated coefficients and standard errors for a sample of 265 persons.
q1. the wilhelms cola company plans to market a new pineapple-flavoured cola this summer. the decision is whether to
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