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The efficacy of a new addiction medication was evaluated in a randomized, placebo-controlled, doubleblind study. The medication in question, Antaquil, is intended to moderate the symptoms of alcohol withdrawal and craving with minimum side effects. Over the course of three weeks, a sample of 36 individuals who were recovering from alcohol addiction were randomly assigned to two groups: one administered the medication and one administered a placebo. At the end of the designated period, participants were administered the Obsessive Compulsive Drinking Scale (OCDS), an instrument that provides a global measure of thoughts about alcohol during nondrinking periods. Scores can range from 0 to 40 with higher scores signaling higher levels of rumination about alcohol. Prior to participation participants were all informed of the nature of Antaquil and were told they could leave the study at any time. Outcome data on the OCDS are shown below
Treatment Gp Placebo Gp
40 37 35 35 27 34 18 24 30 29 28 14 11 23 23 25 30 32 13 37 16 30 17 30 26 29 22 22 19 23 17 31 29 28 10 20
How to compute the mean and the standard deviation for each set of data using appropriate abbreviations and terminology for the data above.
Consider a random sample X1 ,X2 ,• • • , X,, from the Weibull distribution with p.d.f. f( x; 0, -r) = 0-rxi - 1e-0xr, 0 x oo, where O 0, 0 -r, zero elsewhere. (a) If -r is known, find the m.l.e. of 0.
Graph the population regression line by first finding the point on the line corresponding to x = 1000 and then the point corresponding to x = 2000
Is 1 significantly low number of adults requiring eyesight? correction?
1.an experiment was performed to investigate lifetime of a component exposed to high heat. three different oven types
Find the conditional probability. Refer to given Example. What is the probability that a student is full-time given that the student is 15 to 19 years old?
What is the probability that the mean starting salary is between $31,000 and $33,000 - Graduates from a graphic arts course at a community college have a mean starting salary
What are some examples of "marketing" activities that are associated with the Summer Olympics?
question the manager of a frozen yogurt store claims that a medium-size serving contains an average of more than 4
A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12. A random sample of 17 observations from the second population revealed a sample mean of 342 and a sample standard dev..
Are some outcomes of the evolutionary process fundamentally predictable (or inevitable)? Is the path of evolution is guided by deeper principles?
What is the relationship between pretest scores and final exam scores after controlling for cumulative GPA? He also wants to know about the relationship between pretest scores and final exam scores without the influence of the GPA.
Use the attached data set for the following questions (laborEcon.dta) . Feel free to resample the data set if you think it is appropriate. Consider the earning function in the form of a linear regression equation we discussed before:
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