1.A doctor conducted a diagnostic test of plasma oxidized low-density lipoprotein (Ox-LDL) on 200 patients with coronary heart disease and 300 normal people, and coronary angiography was the "gold standard". Ox-LDL level 245.8U/L was regarded as the positive cut-off value for diagnosis. The results are shown in the table below. Table 1 Ox-LDL diagnostic test results of 200 patients with coronary heart disease and 300 normal people coronary angiography coronary heart Diagnosed Ox-LDL level (245. 8U/L) total normal disease 150 100 250 50 200 250 total 200 300 500 Please calculate sensitivity, specificity, positive predictive value, negative predictive value, Youden index.

Q: What is the correct answer ? I have to show work.

A: Given Information: Sample size (n) = 22  Mean (u) = 12 Standard deviation (s) = 5.4

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A: Since here we have two variables p and q, they can take values True (T) and False (F) each.  So, the…

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Q: (p) | (2) dz =.

A: From x=3 to x=5, there is a triangle with base= 2 and height = -3  So the area of the triangle is:…

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A: Sol:-We need to use Bayes' theorem to calculate this probability.  Let A be the event that Stage 3…

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A: Given that,Let P be the set of all vectors of the form 7s+2tst , where s and t are arbitrary.We need…

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Q: The table shows the movement of a stock for 30 randomly selected trading days. "Up" means the stock…

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A: You need to know this before solving the question.

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A: Doubt: How did you figure out the answers.