13) Suppose that your company has just developed a new screening test for a disease, and you are incharge of testing its validity. You decide to evaluate the test on 1200 individuals and compare theresults of the new test to the gold standard. You know the prevalence of disease in your population is20%. The screening test gave a positive result for 228 individuals. 220 of these individuals actuallyhad the disease according to the gold standard13a) Fill in all cells of the 2 x 2 tableResults ofTestScreeningPositiveNegativeTotalGold Standard Determination of DiseasePositiveNegativeTotal13b) Calculate the sensitivity, specificity, and positive predictive value of the new screening test13c) If this test were administered in a population with a disease prevalence of 1% instead of 20%(note that the sensitivity and specificity of the test remain unchanged), how would this influence thepositive predictive value?

The new test was administered to 1200 individuals. The prevalence of disease in the population is…

Answered: 13) Suppose that your company has just…

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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Polyunsaturated fatty acids in the diet favorably affect several risk factors for cardiovascular disease. The principal dietary polyunsaturated fat is linoleic acid. Suppose we randomly selected twelve adults for our study. We took their blood pressure measurements (systolic blood pressure) at the start and recorded them for each adult. Then we placed required these adults to consume 23g/day of safflower oil which is high in linoleic acid for four weeks. At the end of the four weeks, we took another systolic blood pressure(SBP) measurement. The paired data is provided below: Subject 1 2 3 4 5 6 7 8 9 10 11 12 Baseline SBP 119.67 100.00 123.56 109.89 96.22 133.33 115.78 126.39 122.78 117.44 111.33 92.39 1-month SBP 117.33 98.78 123.83 107.67 95.67 128.89 113.22 121.56 126.33 110.39 107.00 93.06 Use the appropriate nonparametric test at alpha level of 0.05, to test whether the diet heavy in linoleic acid increases systolic blood pressure (SBP).
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Help me find the sample size of a population of 500 using yamani formular
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The news release referenced in the previous exercise also included data fromindependent samples of teenage drivers and parents of teenage drivers. In response to aquestion asking if they approved of laws banning the use of cell phones and texting whiledriving, 74% of the teens surveyed and 95% of the parents surveyed said they approved.The sample sizes were not given in the news release, but suppose that 600 teens and 400 parents of teens were surveyed and that these samples are representative of the twopopulations. Do the data provide convincing evidence that the proportion of teens whoapprove of banning cell phone and texting while driving is less than the proportion ofparents of teens who approve?

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