.CO7Sכ-OH?YΣVH10.1 Inference for Categorical Data: Comparing Two ProportionsTreating Lower Back Pain Patients with lower back pain are often given nonsteroidalanti-inflammatory drugs (NSAIDs) like naproxen to help ease their pain. Researchers wondered iftaking Valium along with the naproxen would affect pain relief. To find out, they recruited 112patients with severe lower back pain and randomly assigned them to one of two treatments:naproxen and Valium or naproxen and placebo. After 1 week, 39 of the 57 subjects who tooknaproxen and Valium reported reduced lower back pain, compared with 43 of the 55 subjects in thenaproxen and placebo group.Construct and interpret a 99% confidence interval for the difference inthe proportion of patients like these who would report reduced lower back pain after takingnaproxen and Valium versus after taking naproxen and placebo for a week.Two-sample Z-interval for a difference between two proportionsSTATE the parameter and confidencelevel.PLAN the inference method and checkconditions.2 sample2 interval for P₁ - Pz99% CI for P, -P₂P₁: true proportion of patients like ✓Random assignment to treatmentsthese who would reportreduced lower back pain aftertahing naproxen and Valium for aweek√10%Pz: true proportion of patients likethese who would report reduced.lower back pain after taking /Large Counts Conditionnaproxen placebo for aWeek57-39-1855-43=12DO all necessary visuals andcalculations.CONCLUDE with an interpretation of theconfidence interval in context.We are 99% confident that the interval-0.312 to 0.116 captures P, -P₂ the diffin the true proportions of patients like twould report reduced pain after takhaproven and valium versus afternaproxen and a placebo for a wech

In this problem, we are required to find the 99% confidence interval for the difference in the…

Answered: H 10.1 Inference for Categorical Data:…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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You’re interested in knowing if a walking plus strength training exercise program results in a significantly greater increase in maxVo2 as compared to a walking only or a strength training only exercise program. Participants are randomly selected and then randomly assigned to one of three groups— walking plus strength training, walking only, or strength training only. After 6-months of exercise the participants are assessed. Which statistical analyses was used?
Q1: Placebo effect of exercise In a high-profile research study, Crum and Langer (2007) performed an experiment to test whether the relationship between physical exercise and health is impacted by one's mindset: in other words, if there is any "placebo effect" of exercise. A sample of 84 randomly selected hotel workers in the United States were placed either into a treatment group (n=44) or control group (n=40) depending on which hotel they worked at. The treatment group was given information demonstrating how their work is good physical exercise, while the control group was not given this information. They measured the body mass index (BMI) for each worker before the experiment and again four weeks after the experiment. a. Are the treatment group and control group independent of each other, and if so why? b. Now consider the treatment group alone: are the measurements of BMI taken before and after the experiment independent of each other, and if so why? c. What is the most appropriate…
The data below are from an independent-measures experiment comparing three different treatment conditions. Use an ANOVA with a = .05 to determine whether these data indicate any significant differences among the treatments Treatment 1 Treatment 2 Treatment 3 0 1 4 N = 12 0 4 3 G = 24 0 1 6 åX2 = 92 2 0 3 M = 0.5 T = 2 M = 1.5 T = 6 M = 4 T = 16 SS = 3 SS = 9 SS = 6
Identifying individuals with a high risk of Alzheimer's disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study. 7-Minute Screen Cognitive Series 3 11 8 19 10 22 8 20 4 14 7 13 4 9 5 20 14 25 Which statistical test would you select: Answer H0: Answer H1: Answer What is the coefficient that indicates the strength of the relationship? Answer =Answer What is the standard error? Answer What is the appropriate 95% CI? [ Answer , Answer ] What is the d-effect size? Answer What is the t-observed? Answer What is the actual p-value? Answer THREE decimal places…
. A researcher suspects that the actual prevalence of generalized anxiety among children and adolescents is higher than the previously reported prevalence of generalized anxiety disorder among children and adolescents. The previously reported prevalence of generalized anxiety disorder among children and adolescents is 4.1%, and the researcher conducts a study to test the accuracy of the previously reported prevalence of generalized anxiety disorder by recruiting 98 children and adolescents from various pediatricians’ offices and tests them for generalized anxiety disorder using the DSM-5. The researcher determines that the prevalence of generalized anxiety disorder among the participants of the study is 6.8%. The researcher’s hypothesis, for a level of significance of 5%, should resemble which of the following sets of hypothesis? A) H0: p > .041; H1: p = .041; alpha= .05 B) H0: p > .041; H1: p = .041; alpha= .95 C) H0: p = .041; H1: p > .041; alpha= .05 D) H0: p = .041; H1: p…
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State the hypotheses for each of the three separate tests included in the two-factor ANOVA.

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