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A supervisor in the Department of Rehabilitive Services is critical of the performance of one of her counselors. The counselor is expected to arrange job training for those in need of vocational rehabilitation so that they may find employment. Yet the counselor has managed to place just over 30% of his clients. The counselor argues that he is doing a good job and that the reason for his overall low rate of placement is that most of his clients are severely disabled, which makes them very difficult to place.
The counselor's case load is presented in the accompanying table. Percentage the table appropriately, and evaluate who is correct -- the supervisor or the counselor?
Job Placement Not Severely Disabled Severely Disabled
Not Placed 42 100
Placed 24 40
Suppose that in an observational study, it is observed that the risk of heart disease increases as the amount of dietary fat consumed increases.
Dr. Shelly Cantin is a psychopharmacologist who believes that she has developed an effective drug to enhance memory.
In Exercise 8.16, you examined the proportion of high school students who cheated on tests at least twice during the past year. Included in that study were the results for both 2002 and 2004.
Does the 99% confidence interval include the value 50? Why?
Results show access to health care was increased at p
A chi-square test of the statistical significance of the relationship has a p-value of .19. Is this evidence that there is a relationship? What is the justification for this conclusion?
This exercise will help you become more proficient at recognizing, translating, and evaluating if and and statements.
a What is the role today of the Export-Import Bank of the United States? b. Describe the Direct Loan Program administered by the Export- Import Bank.
Final exams. Anna, a language major, took final exams in both French and Spanish and scored 83 on each. Her roommate Megan, also taking both courses.
You can help him determine this by calculating the following probability: What is the probability of Jim collecting a sample mean from those 50 students that is less than or equal to 48.7 gallons?
In Example 6.9 (page 373), we found that the average student debt has risen between 1997 to 2002. In computing the difference, we did not adjust for differing values of the dollar.
a. What is the probability that a traveler is carrying an illegal amount of liquor and is identified as a suspect?
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