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Question: Don't do drugs! Cocaine addicts need cocaine to feel any pleasure, so perhaps giving them an antidepressant drug will help. A three-year study with 72 chronic cocaine users compared an antidepressant drug called desipramine with lithium (a standard drug to treat cocaine addiction) and a placebo. One-third of the subjects were randomly assigned to receive each treatment. Here are the results:
(a) Compare the distributions of relapse status for the three treatments.
(b) Are the differences among the three groups statistically significant? Give appropriate evidence to support your answer.
Repeat (i) for n = 20,p = 0.5 for the binomial random variable, and λ = 10 for the Poisson random variable.
How many students should be surveyed if a 90% confidence interval is desired and the margin of error is to be only 3%?
General Discrete Random Variable
Suppose X is a Rayleigh random variable and is an arcsine random variable, - Furthermore, assume and are independent. Find the PDF of Z =XY.
A jumbo mortgage is a mortgage with a loan amount above the industry-standard definition of conventional conforming loan limits.
Normally distributed with a mean of 113 grams and a standard deviation of 5.4 grams. Find the probability that if 7 bags are randomly selected, their mean weight exceeds 114 grams.
Is there any evidence to suggest that the standard deviation in beam diameter at 10 feet is greater than 0.3? Assume normality and use a = 0.05.
a horse race has 12 entries. assuming that there are no ties what is the probability that the three horses owned by one
Assuming that these numbers are exact and that the sample was randomly chosen from the entire population of interest, give a 90% confidence interval.
the herb gingkgo biloba is commonly used as a treatment to prevent demnetia. in a study of the effectiveness of this
What is the probability that the person will be hospitalized for a drug-related problem, given that the person has received the PMI sheet?
a) Create a probability model for this carnival game. b) Find the expected number of darts you'll throw.
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