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Pt1420 Unit 6

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Sections 1.1
Classify the variable as qualitative or quantitative.
22. Student ID number
Answer: Quantitative
Determine whether the quantitative variable is discrete or continuous.
24. Volume of water lost each day through a leaky faucet
Answer: Continuous variable
Determine the level of measurement of each variable.
32. Movie ratings of one star through five stars
Answer: Ordinal 34. Year of birth of college students
Answer: Interval
Application of concept
52. Retirement Planning The Principal Financial Group conducted a survey of 1172 employees in the United States between July 28, 2010, and August 8, 2010, and asked if they were currently participating in the employer-sponsored automatic payroll deduction for a 401(k) plan to save for …show more content…
20. Order of the Questions Consider the following two questions: (a) Do you believe that the government should or should not be allowed to prohibit individuals from expressing their religious beliefs at their place of employment? (b) Do you believe that the government should or should not be allowed to prohibit teachers from expressing their religious beliefs in public school classrooms?
Do you think the order in which the questions are asked will affect the survey results? If so, what can the pollster do to alleviate this response bias? Discuss the choice of the word prohibit in the survey questions.
Answer: Yes I do think the order of the questions may affect the survey results. The pollster could randomize the order the questions are administered to each participant.
Use strong words such as “prohibit” represent control or action and can result to biased survey results.
Section …show more content…
John’s wort with placebo in outpatients with major depression. To do this, they recruited 200 adult outpatients diagnosed as having major depression and having a baseline Hamilton Rating Scale for Depression (HAM-D) score of at least 20. Participants were randomly assigned to receive either St. John’s wort extract, 900 milligrams per day (mg/d) for 4 weeks, increased to 1200 mg/d in the absence of an adequate response thereafter, or a placebo for 8 weeks. The response variable was the change on the HAM-D over the treatment period. After analysis of the data, it was concluded that St. John’s wort was not effective for treatment of major depression. Source: Richard C. Shelton, MD, et al. “Effectiveness of St. John’s Wort in Major Depression,” Journal of the American Medical Association 285:1978–1986,

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