Patients are given a drug treatment and then evaluated. Symptoms either improve, degrade, or remain the same with probabilities 0.4, 0.1, 0.5, respectively. Assume that four independent patients are...

R3

Extracted text: Patients are given a drug treatment and then evaluated. Symptoms either improve, degrade, or remain the same with probabilities 0.4, 0.1, 0.5, respectively. Assume that four independent patients are treated and let X and Y denote the number of patients who improve and degrade, respectively. Calculate the covariance and correlation between X and Y. Round to hundredths decimal places, i.e., 0.12. Cov(X,Y) = Corr(X,Y) =