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- What is meant by the sample space of an experiment?J 1 Explain how length and lead time bias impacts the results of an evaluation of a screening program.6.6.4 To study the difference in drug therapy adherence among subjects with depression who received usual care and those who received care in a collaborative care model was the goal of a study conducted by Finley et al. (A-21). The collaborative care model emphasized the role of clinical pharmacists in providing drug therapy management and treatment follow-up. Of the 50 subjects receiving usual care, 24 adhered to the prescribed drug regimen, while 50 out of 75 subjects in the collaborative care model adhered to the drug regimen. Construct a 90 percent confidence interval for the difference in adherence proportions for the populations of subjects represented by these two samples.
- Given the current culture for environmental sustainability and energy efficiency, detergents are promoting cold water performance. What do these results suggest about the cleaning effectiveness of using cold water? Means table Cold Hot Lukewarm 1 60.3 80.7 67.7 69.57 2 75.2 77.2 70.1 74.17 3 73.4 80.7 77.1 77.07 4 63.8 90.1 79.9 77.93 5 79.8 86.2 83.2 83.07 70.5 82.98 75.6 76.36 Two Way Anova Source of Variation SS df MS F P-value Sample 3837.08 2 1968.54 17.8238 0.0000 Columns 2967.4267 4 741.8567 6.7170 0.0001 Interaction 2452.0533 8 306.5067 2.7752 0.0071 Within 14910 135 110.4444 Total 24266.56 149 Data Temperature Dtrgent1 Dtrgent2 Dtrgent3 Dtrgent4 Dtrgent5 Cold 66 83 70 44 84 Cold 87 62 75 59 67 Cold 55 61 62 47 99 Cold 41 85 68 60 85 Cold 68 75 72 79 73 Cold 49 78 92 62 74 Cold…A school psychologist notes that the average number of times that students are disrup- tive during class is 1.4 (u 1.4] times per day Following recent classroom policy changes the psychologist tests if the number of disrup- tions during class has changed. He records the following number of disruptions observed during a class day: 2, 4,3, 5, 4, 1, 1, and 4 1. Test the hypothesis that the number of complaints has increased or decreased using a .05 level of significance. State the value for the test stastistic and the decision to retain or rejct the null hypothesis. 2.compute effect size using estimated Cohen's D.Do well-rounded people get fewer colds? A study on the Chronicle of Higher Education was conducted by scientist at Carnegie Mellon University, the University of Pittsburgh and the University of Virginia. They found that people who have only a few social outlets get more colds than those who are involved in a variety of social activities. Suppose that of the 276 healthy men and women tested, n1=96 had only a few social outlets and n2=105 were busy with six or more activities. When these people were exposed to a cold virus, the following results were observed: Construct a 99% confidence interval for the difference in the two population proportions.
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- The Accountability Office is auditing Star International Airways, which flies numerous charters. The Titan contract specifies that the average flight may be no more than 15 minutes late. A sample of 20 flights reveals the results below: Flights and Their Delay Status Flight Number Status 217 On time 167 20 minutes late 133 17 minutes late 207 64 minutes late 219 On time 457 96 minutes late 371 30 minutes late 612 On time 319 6 minutes late 423 12 minutes late 684 11 minutes late 661 61 minutes late 511 On time 536 On time 493 17 minutes late 382 12 minutes late 115 6 minutes late 107 3 minutes late 19 26 minutes late 123 19 minutes late The newly hired junior analyst, Bob, is requested to write a memo interpreting this information. Bob finds that he needs a good grasp of statistical inference to write the memo. He researches statistical inference and…A coffee company uses a data-based approach to improving the quality and customer satisfaction of its products. When survey data indicated that the coffee company needed to improve its package-sealing process, an experiment was conducted to determine the factors in the bag-sealing equipment that might be affecting the ease of opening the bag without tearing the inner liner of the bag. One factor that could affect the rating of the ability of the bag to resist tears was the plate gap on the bag-sealing equipment. Data were collected on 19 bags in which the plate gap was varied. 1) Assuming a linear relationship, use the least-squares method to find the regression coefficients b0 and b1. 2) Interpret the meaning of the slope, b1, in this problem. Choose the correct answer below. A. For each increase of one in the tear rating, the plate gap is expected to increase by b1 units. B. The approximate tear rating when the plate gap is 0 units is b1. C. The…A coffee company uses a data-based approach to improving the quality and customer satisfaction of its products. When survey data indicated that the coffee company needed to improve its package-sealing process, an experiment was conducted to determine the factors in the bag-sealing equipment that might be affecting the ease of opening the bag without tearing the inner liner of the bag. One factor that could affect the rating of the ability of the bag to resist tears was the plate gap on the bag-sealing equipment. Data were collected on 19 bags in which the plate gap was varied. Assuming a linear relationship, use the least-squares method to find the regression coefficients b0 and b1. b0 = b1 =