Question 15 5 pt Compute the coefficient of correlation between random variables X and Y. (Report your answer with decimal precision. Make sure that you round up your answer to two decimal points.)Question 12 2.5 pt Compute the standard deviation for random variable X. (Report your answer with decimal precision. Make sure that you round up your answer to two decimal points.) Question 13 5 pts Compute the covariance between random variables X and Y. (Report your answer with decimal precision. Make sure that you round up your answer to two decimal points.)Consider the joint probability distribution below: Prob. (X=X, and Y=Y.) X Y 0.15 20 0.35 -4 12.5 0.5 O 23 Question 11 2.5 Compute the expected value for random variable X. (Report your answer with decimal precision, Make sure that you round up your answer to two decimal points.)