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A clinical trial is conducted to compare an experimental medication to placebo to reduce the symptoms of asthma. Two hundred participants are enrolled in the study and randomized to receive either the experimental medication or placebo. The primary outcome is self-reported reduction of symptoms. Among 100 participants who received the experimental medication, 38 report a reduction of symptoms as compared to 21 participants of 100 assigned to the placebo.
A. Generate a 95% CI for the difference in proportions of participants reporting a reduction of symptoms between the experimental and placebo groups.
B. Estimate the RR for reduction in symptoms between groups.
C. Estimate the OR for reduction in symptoms between groups.
D. Generate a 95% CI for the RR.
How large a sample of one-bedroom apartments would be needed to estimate the mean within $20 with 90% confidence?
A campus organization will select one day of the week for an end of year picnic. Assume that the weekdays, Monday through Friday, are equally likely and that each weekend day
The unlikelihood of everyone who plays the lottery choosing a correct 6 would be very large indeed. Is this unethical advertising? Is it misleading? is the lottery in general, unethical? Why or why not?
What is the difference between the Wilcoxon signed-ranks test and the Wilcoxon rank-sum test? no minimum word count.
A company's net sales is $ million from 1993-2002, determine the least squares equation and based on this info, what are the estimated sales for 2005?
Suppose that the scores of architects on a particular creativity test are normally distributed. What percentage of architects have Z scores (a) above .10, (b) below 10, (c) above .20, (d) below .20, (e) above 1.10, (f) below 1.10, (g) above -.10, (h)..
Bottling Company Case Study
They then call these 100 people. Does this sampling plan result in a random sample? Simple random sample? Explain.
Linda would like to maintain a 90% service level. what safety stock level do you recommend for BX-5?
Find the expected frequency to test the claim that walking and low, moderate, and high blood pressure are not related. Round to the nearest tenth if necessary.
Normally distributed with a mean of 48.06 pounds and a standard deviation of 3.57 pounds. Let X represent the weight of a randomly selected bag. For what value of c is P(E(X) - c
consider two urns. the first contains two white and seven black balls and the second contains five white and six black
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