QUESTIONS 1-5. Data in the table below were collected on a new test for the diagnosis of COVID-19in a sample of 100,000 adults from the United States. Answer questions 1-5 based on these data.StatusCOVID-19 PresentCOVID-19 AbsentPositive Test9,5004,500Negative Test50085,5002. What is the sensitivity of the test?O 0.80O 0.95O 0.90O 0.85

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Answered: QUESTIONS 1-5. Data in the table below…

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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In a study of high school students at least 16 years of age, researchers obtained the survey results summarized in the table below (based on data from “Texting While Driving and Other Risk Motor Vehicle Behaviors Among U.S. High School Students” by O’Malley, Shults, and Eaton, Pediatrics, 131, No.6). Irregular Seat Belt Use? Yes No RT Texted While Driving 1737 2048 3785 Did not Text While Driving 1945 2775 4720 Column total 3682 4823 8505 State the null and alternative hypotheses. Null hypothesis: H0 Texting when driving is independent of irregular seat belt use. Alternative hypothesis: Texting when driving is dependent of irregular seat belt use. Assuming independence, what are the expected frequencies for each of these variables? E=(row total)(column total) (grand total) What is the value of the X2 statistic? X2=E(0-E)2…
QUESTION 1 Use the following to answer all questions in the homework: A professor wants to know which type of instructional mode students had more satisfaction. The professor randomly selected n = 5 students from each of the following types of classes: online only, hybrid, and face-to face only. Student were given a satisfaction survey. Are their differences in student satisfaction the different instructional modes. The data are below: Online Hybrid Face-to-Face among 1 13 3 3 2 3) Calculate the degrees of freedom for Between Groups and Within Groups. O dfBG 12; dfwG = 14 %3D O dfBG = 2; dfwG= 12 O dfBG = 2; dfwG = 14 %3D O dfBG = 12; díwG = 2 QUESTION 2 Calcuate the Sum of Squares total (SStot)- 161.20 Priv Save Al Click Save and Submit to save and submit. Click Save All Answers to save all answers. MacBook Air 2-22 rM 334 33
Question 9 Dr. Jameson wanted to know if IQ scores differed between male and female participants in his study. He gave 28 participants an IQ test and then compared IQ scores for gender differences. He hypothesized that there would be a statistically significant gender difference in IQ scores. Contrary to Dr. Jameson's hypothesis, there were no differences in IQ scores between men and women in his study. From the results of the study, Dr. Jameson must the research hypothesis. the null hypothesis and fail to reject; reject reject; retest reject; fail to reject retest; reject
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QUESTION 5 What is iny 0.8944)? (Use the normal tables and report to two digits.) QUESTION 6 What is 0inyl 0.9878)? (Use the normal tables and report to two digits.)
Question 2 Light shop wants to inspect purchasing units. 6 bulbs is choosen from 20 units. Of the 20 there were 6 defective units. Use hypergeometric to find the variance of defective units (answer to three decimal places) hp HEWL ETT PACKARD
Question 2 Use the following information to set up a 2 x 2 table and calculate appropriate measure of association. The following are the results from a population-based study to investigate whether high fat consumption is a risk factor for coronary heart disease (CHD): A total of 450 patients were selected from various hospitals and a total of 702 participants without CHD matched by age and sex were selected from the neighborhood where patient lived. A total of 405 CHD patients and 324 controls reported eating fatty food and the remaining reported normal diet. e) Interpret your results.
Question 12 The SSRUR-125.6, SSR-376.4, number of restrictions-3, n-87, and there are 8 right hand side variables. Calculate the F statistic.
Question 2 Use the following information to set up a 2 x 2 table and calculate appropriate measure of association. The following are the results from a population-based study to investigate whether high fat consumption is a risk factor for coronary heart disease (CHD): A total of 450 patients were selected from various hospitals and a total of 702 participants without CHD matched by age and sex were selected from the neighborhood where patient lived. A total of 405 CHD patients and 324 controls reported eating fatty food and the remaining reported normal diet. c) What is the exposure of interest?
Questions 12-14: Results of a randomized clinical trial of a new vaccine formulated to protect against SARS CoV-2 infection are shown in the following table. A total of 100,000 adults who were negative for infection at baseline enrolled in the study. Estimates shown in the following table are based on results after follow-up of six months. SARS COV-2 SARS COV-2 Status Positive Total Subjects Negative Received Vaccine 10 49,990 50,000 Did not receive vaccine 200 |49,810 50,000 13. What is the relative risk (RR) based on these data? O B. RR = 1.00 O D. RR = 0.05 O A. RR = 20 O C. RR = 0.10 %3D
Question 2 A researcher was interested in studying if there is a significant relationship between the severity of COVID 19 and blood types of individuals. 2400 individuals were studied and the results are shown below. Condition Blood Type Blood Type Blood Type Blood Type Blood Type O A B AB Total Critical 64.00 44 20 8 136 Severe 175.00 129 50 15 369 Moderate 211.00 528 151 125 1015 Mild 200.00 400 140 140 880 Total 650.00 1101 361 288 2400 State both the null and alternative hypotheses. Provide the decision rule for making this decision. Use an alpha level of 5%.
Use the following scenario for questions 1-4: Dr. Wiese wants to determine whether duration of pregnancy and type of opiate use among pregnant women predict developmental delays in their children. In a sample of 30 new mothers, Dr. Wiese measured the duration of their pregnancies (premature, mature, postmature) and the type of opiate that they used during pregnancy (oxycodone, heroin). All participants' babies were then rated on how closely they have met developmental milestones on a scale ranging from 1-10. 1. Identify one of the independent variables. How many levels does this variable have? 2. Identify the other independent variable. How many levels does this variable have? 3. This study is a .............x ...................factorial design.

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