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Question: Are the variables the coaches and the 2 hour training program? What would be the operational definitions? Is that a description of how the

Question:

Are the variables the coaches and the 2 hour training program? What would be the operational definitions? Is that a description of how the coaches and 2 hour training program work? Is this a nominal or ordinal level of measurement?

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BACKGROUND: Pain self-management is an effective, evidence-based treatment for chronic pain. Peer support, in which patients serve as coaches for other patients, has been effective in other chronic conditions and is a potentially promising approach to implementing pain self management programs using fewer clinical resources.

OBJECTIVE: To test a peer coach-delivered pain self management program for chronic pain.

DESIGN: Randomized controlled trial.

PARTICIPANTS: Veterans with chronic musculoskeletal pain.

INTERVENTION: Intervention patients were assigned a trained peer coach for 6 months. Coaches, who were volunteers, were asked to contact their assigned patients, either by phone or in person, twice per month. Coaches and patients were given an intervention manual to guide sessions. The control group was offered a 2-hour pain selfmanagement class.

MAIN MEASURES: The primary outcome was total pain, assessed by the Brief Pain Inventory (BPI). Secondary outcomes were anxiety, depression, pain catastrophizing, self-efficacy, social support, patient activation, health related quality of life, and healthcare utilization. Outcomes were measured at baseline, 6 months, and 9 months

KEY RESULTS: Two hundred fifteen patients enrolled (120 intervention, 95 control). Adherence to intervention protocol was low, with only 13% of patients reporting having at least the recommended 12 peer coach meetings over the 6-month intervention. BPI total decreased from baseline to 6 months and baseline to 9 months in both groups. At 9 months, this change was statistically significant (intervention, ? 0.40, p = 0.018; control, ? 0.47, p = 0.006). There was not a statistically significant difference between groups on BPI at either time point. No secondary outcomes improved significantly in either group after adjusting for multiple comparisons. CONCLUSIONS: Patients randomized to peer support did not differ from control patients on primary and secondary outcomes. Other peer support models that do not rely on volunteers might be more effective

Identify two key study variables. Describe the operational definitions of each variable and evaluate the quality and clarity of these definitions.

Describe what level of measurement (nominal, ordinal, interval, or ratio) the authors used for the two variables you identified

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The duration of calls in minutes over a telephone line is as follows. Use Kolmogorov-Smirnov test with a = 0.05 to verify that the numbers given have an exponential distribution of A = 0.2. 1. State the hypothesis 2. Test the data by using the K-S test The duration of calls in minutes over a telephone line is as follows: 15.85 10.67 9.98 9.52 7.36 11.64 25.47 5.26 12.24 18.80 13.75 12.53 6.88 9.52 8.93 Use Kolmogorov-Smirnov test with a = 0.05 to verify that the numbers given have an Exponential Distribution with 2=0.2. a- State the hypothesis. b- Test the data by using K-S test.Use a Kolmogorov Smirnov (KS) Test in order to determine if the following data set comes from an Exponential distribution with mean equal to five Data 0.433577647 1.077296386 1.461024528 2.037106422 3.671167985 3.724253017 3.815970293 3.905489821 6.842680422 6.933953839 Can we reject the hypothesis that the data come from an exponential distribution with a mean equal to five? Select one: O True O FalseQuestion 95 2 pts Which of the following nonparametric tests is used to answer the following research question: "What is the exact likelihood of getting six heads on a toss of six coins?" O McNemar O Kolmogorov-Smirnov O the median test O Fisher's exact16. A company uses a new supplement in their chicken feed. They perform a randomised experiment on two groups of chicken. One group is given the standard chicken feed for two months, and the other is given the feed with supplement for two months. The company is interested if the average weight of chickens for those that had the feed with supplement is larger than those chickens that had the standard feed after two months. The resulting data from this experiment is an example of: a) Paired samples b) Two independent samples c) One independent sample d) Categorical Data 17. Which of the following statements is TRUE? a) A two-sample t-test is used for testing the equality of means of three or more populations b) A two-sample t-test is used for assessing the difference between the means of two independent populations c) A two-sample t-test is used for assessing the difference between the proportions of two independent populations d) A pooled standard deviation is used in a two-sample t-test when we assume unequal population variances 18. Data collected in a survey of voters in Australia and New Zealand showed that 57/100 Australian voters were satisfied with their Prime Minister, and 72/120 New Zealand voters were satisfied with their Prime Minister. In a test of the difference between the two population proportions, what would the value of the pooled proportion be (to 2 decimal places)? a) 0.57 b) 0.62 c) 0.05 d) 0.59 Questions 19 and 20 use the following information: A sample of students were asked how long they spent studying for an exam ("study"; in hours), and what mark they received for the exam ("mark"; out of 100). A linear regression was fitted to this data, and the fitted model was: mark = 20 + 4.2 x study 19. Which of the following statements is FALSE? a) The model suggests that, on average, a student that does not study could expect to get a mark of 20 b) There is a positive relationship between the variables "mark" and "study" c) For each additional hour of study, a student could expect to increase their mark by 4.2, on average d) The correlation coefficient between mark and study is r = 4.2

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