0.5511 1.96X/0,5516.551 ± 0.11038440OtolaryngologyMany children have tympanostomy tubes surgically inserted in their ears to reduce hearing loss associatedwith persistent otitis media and prevent recurrences of episodes of otitis media after tubes are inserted.However, acute otorrhea (a discharge from the external ear indicating inflammation of the external ormiddle ear), where middle ear fluid drains through the tube, is a common side effect with tympanostomytubes.P=0.5511=78PuolueA clinical trial was conducted among children 1-10 years of age with prior symptoms of otorrhea comparingefficacy of (i) antibiotic eardrops, (ii) oral antibiotics, and (iii) observation without treatment, referred tobelow as observation, were seen at home by study physicians at 2 weeks and 6 months afterrandomization. The primary outcome was the presence of otorrhea at 2 weeks observed by studyphysicians. The results are given in the table below.Number of children with otorrhea at 2 weeks of follow-up95% confidence IntervalGroupAntibiotic eardropsOral antibioticsmargObservation77Correct (0,4Number ofchildren77You can use SALT, to answer parts of this question. Please note that the Inferential Statistics page inSALT does not use the continuity-corrected version of the test statistic.76= 0,051948051978=78Number of children with otorrhea at 2weeks(a) Provide a point estimate of the prevalence of otorrhea at 2 weeks in the observation group. (Roundyour answer to three decimal places.)Curred 20.5510.55128 20573Provide a 95% confidence interval for the prevalence of otorrhea at 2 weeks in the observation group.(Enter your answer using interval notation. Round your numerical values to three decimal places.)0.441, 0.661)35(b) Provide a point estimate of the prevalence of otorrhea at 2 weeks in the observation group. (Round40.05243 H₂ : P = 0.5PleaseNote: the continuityConnectiondo estrot workFind the test statistic. (If the test does not have a defined test statistic, enter DNE. Round youranswer to two decimal places.)DNEUse technology to find the p-value. (Round your answer to four decimal places.)p-value =0,192This answer is not correctInterpret the results in words.Please explain without havinga test statistic how to get the PualueO Reject Ho. There is insufficient evidence to conclude that there is a significant difference indeterminations for supine vs. upright images.O Fail to reject Ho. There is insufficient evidence to conclude that there is a significant differencein determinations for supine vs. upright images.Need Help? Read ItO Reject Ho. There is sufficient evidence to conclude that there is a significant difference indeterminations for supine vs. upright images.O Fail to reject Ho. There is sufficient evidence to conclude that there is a significant difference indeterminations for supine vs. upright images.

Given information: Supine images Yes No Upright images Yes 9 3 No 10 28

Answered: H₂: P# 0,5 Please Note: the continuity…

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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Type II error occurs when an individual fails to reject H0 when H0is false. True or False?
Coronary stenosis (narrowing of the artery supply to the heart muscle) is a direct cause of heart disease. A theory suggests that chronic cytomegalovirus (CMV) infection narrows coronary vessels and leads to coronary heart disease. To test this theory, 75 patients undergoing angioplasty were followed for 6 months following their procedure. The 49 patients who were seropositive for CMV experienced an average luminal diameter reduction of 1.24mm (s1 = 0.83 mm). In contrast, the 26 patients who were seronegative for CMV experienced and average luminal reduction of 0.68 (s2 = 0.69).k Test whether this mean difference in luminal reduction is significant. Show all hypothesis-testing steps. Do the data support the hypothesis that chronic CMV virus infection plays a role in coronary luminal reduction?
Coronary stenosis (narrowing of the artery supply to the heart muscle) is a direct cause of heart disease. A theory suggests that chronic cytomegalovirus (CMV) infection narrows coronary vessels and leads to coronary heart disease. To test this theory, 75 patients undergoing angioplasty were followed for 6 months following their procedure. The 49 patients who were seropositive for CMV experienced an average luminal diameter reduction of 1.24mm (s1 = 0.83 mm). In contrast, the 26 patients who were seronegative for CMV experienced and average luminal reduction of 0.68 (s2 = 0.69).k Test whether this mean difference in luminal reduction is significant. Show all hypothesis-testing steps. Do the data support the hypothesis that chronic CMV virus infection plays a role in coronary luminal reduction? What is the 95% confidence interval?
When Type I error occurs?
Neutropenia. Neutropenia is an abnormally low number of neutrophils (a type of white blood cell) in the blood. Chemotherapy often reduces the number of neutrophils to a level that makes patients susceptible to fever and infections. G. Bucaneve et al. published a study of such cancer patients in the paper “Levofloxacin to Prevent Bacterial Infection in Patients With Cancer and Neutropenia” (New England Journal of Medicine, Vol. 353, No. 10, pp. 977–987). For the study, 375 patients were randomly assigned to receive a daily dose of levofloxacin, and 363 were given placebo. In the group receiving levofloxacin, fever was present in 243 patients for the duration of neutropenia, whereas fever was experienced by 308 patients in the placebo group. a. At the 1% significance level, do the data provide sufficient evidence to conclude that levofloxacin is effective in reducing the occurrence of fever in such patients? b. Find a 98% confidence level for the difference in the proportions of such…
Captopril is a drug designed to lower systolic blood pressure. When subjects were treated with this drug, their systolic blood pressure readings (in mm Hg) were measured before and after the drug was taken. Results are given in the accompanying table (based on data from "Essential Hypertension: Effect of an Oral Inhibitor of Angiotensin-Converting Enzyme," by MacGregor et al., British Medical Journal, Vol. 2). Using a 0.01 significance level, is there sufficient evidence to support the claim that captopril has an effect on systolic blood pressure?
C Clever | Portal I Assessment Post Attendee - Zoom O Sign In - myON x + Ô https://encase.te21.com/Assessment/View/1c6fce16-0aa3-4b89-bc8f-49b61f158e75/6164022c-75a6-4c37-82 CHCASE Dashboard Alg I Middle Pretest Part 1 CASE MS 2020-2021 Calculator Active 日Calculator A student saves money, starting with an initial amount of money earned from working at a summer camp and then saving an equal amount per week. The total amount saved after w weeks is represented by the expression 120+ 14w. Which statement is true? O The initial amount of money earned from working at the summer camp is $14. O The initial amount of money earned from working at the summer camp is $134. O The term 14w represents the student saving $14 per week for w weeks. O The term 120 represents the student saving $120 per week for w weeks Copyright C2021 Certica Solutions, Inc. P Type here to search 12 f3 esc & $4 8 6. %23 2 14+
A study was conducted to examine if children with autism spectrum disorder (ASD) had higher prenatal exposure to air pollution, specifically particulate matter < 2.5 g in diameter (PM2.5). Researchers obtained birth records of all children born in Los Angeles between 2000 and 2008 and linked these to the Department of Developmental Services records to determine if any of those subjects had been diagnosed with ASD or not. They used the birth addresses given in the birth records to determine the average daily PM2.5 for the third trimester for each child. The standard deviation for PM2.5 among ASD subjects was found to be 34.6 and for non-ASD subjects was 16.8. Assume PM2.5 is normally distributed. 4a. What was the study design? * Randomized Clinical Trial (RCT) * Case Report * Nested Case-Control Study * Case-Control Study * cross-sectional study Cohort Study 4B. What are the null and alternative hypotheses? 4c. What type of statistical test would you use to analyze the…
Dioxin Researchers have linked an increase in the inci-dence of breast cancer in Italy to dioxin released by an industrial accident in 1976. The study identified 981women who lived near the site of the accident and were under age 40 at the time. Fifteen of the women had devel-oped breast cancer at an unusually young average age of 45. Medical records showed that they had heightened con-centrations of dioxin in their blood and that each tenfold increase in dioxin level was associated with a doubling ofthe risk of breast cancer. (Science News, Aug. 3, 2002)
Captopril is a drug designed to lower systolic blood pressure. When subjects were treated with this drug, their systolic blood pressure readings (in mm Hg) were measured before and after the drug was taken. Results are given in the accompanying table (based on data from “Essential Hypertension: Effect of an Oral Inhibitor of Angiotensin-Converting Enzyme”, by MacGregor et al., BMJ, Vol. 2). Using a 0.01 significance level, is there sufficient evidence to support the claim that captopril has an effect on systolic blood pressure? i) Use the Wilcoxon signed-ranks test to conduct the required test without using "wilcox.test" function in R. Please state the hypothesis, provide the p-value, and the conclusion in the context of the problem. ii) Use the Wilcoxon signed-ranks test to conduct the required test using "wilcox.test" function in R. Please present a screenshot of the R output of your call to the function wilcox.test. iii) Would you recommend the Wilcoxon signed-ranks test over the…
Researchers have recently hypothesized that patients with myotonic dystrophy (a neuromuscular disease) also have hyperparathyroidism, a syndrome caused by an overactive parathyroid gland. To test this hypothesis, they measured the body’s response to a calcium challenge in patients with myotonic dystrophy, patients with other types of dystrophy (nonmyotonic dystrophy), and normal subjects. One of the biochemical variables they measured was the amount of cAMP excreted by the kidneys. Elevated renal cAMP excretion would be consistent with hyperparathyroidism. The data is contained in the screenshot, where two variables are listed: cAMP – Amount of cAMP excreted by the kidneys, measured in nmol/dL. patient – A factor defining the clinical status of the patient, with three levels: 1, Normal Patient in control group, with no disease. 2, Myotonic Patient with myotonic dystrophy. 3, Nonmyotonic Patient with nonmyotonic dystrophy. (a) Perform an analysis of variance calculation to test the…
A research center claims that more than 21% of employees in a certain country have changed jobs in the past three years. In a random sample of 280 people from that country, 70 have changed jobs in the past three years. At a = 0.10, is there enough evidence to support the center's claim? Complete parts (a) through (e) below.

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