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Question: Find an example of an observational study in the news. Answer the following questions about it. Be sure to include the news article with your response.
a. What are the explanatory and response variables, or is this distinction not possible?
b. Briefly describe how the study was done. For instance, was it a case-control study, a prospective or retrospective study?
c. Discuss possible confounding variables. For instance, were any possible confounding variables included in the study and news report? Can you think of possible confounding variables that were not mentioned?
d. Pick one of the "Difficulties and Disasters" in Section 6.4 and discuss how it applies to the study.
Michelle is a counselor at the local crisis center. She wishes to determine if there is a relationship between the gender of an individual and the amount of alcohol consumed.
A multiple choice test consists of 25 questions with possible answers of a, b, c, d, and e. Estimate the probability that with random guessing, the number of correct answers is between 3 and 10 inclusive.
A certain disease occurs in 35% of the population. A test for the disease is fairly accurate: it misclassifies people with the disease as healthy 6% of the time and reports that a healthy person is diseased just 7% of the time.
Draw a scatter diagram representing these data.- Using the "eyeball" method, fit a straight line to the data.- Does there appear to be any relationship between the variables? If so, is the relationship direct or inverse?
the following data show the number of fruit fly killed at varying concentrations of nicotine.the number of ies killed
Explain whether x‾ or μ is the correct statistical notation for each mean described.- The mean hours of study per week was 15 hours for a sample of n =- 30 students at a college.
The manager of the greeting card section of Mazey's department store is considering her order for a particular line of Christmas Cards. Develop the payoff table for this decision situations.
Find the most appropriate statistical procedure: Teacher of low-level reading group interested in average score for group of 25 students?
During a meeting, one hospital administrator indicated that 70% of the geriatric patients are males. What is the sample proportion of male patients?
the world series of baseball is to be played by team a and team b. the first team to win 4 games wins the series out
A company is calculating the cost of equipment maintenance for its budget. In order to decide the budget, the number of machine malfunctions, X, per month is considered. Determine the expected value, variance and standard deviation of the number of..
1. suppose a 95 confidence interval is computed for u resulting in the interval 112.4 121.6. then it would be accurate
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