Question

A qualifying exam for a postgraduate course has a maths section and a verbal section. Students reeive a score of 1, 2, or 3 on each section. Define X as a student's score on the maths section and Y as a student's score on the verbal section. Test scores vary according to the following bivariate probability distribution. 1 0.33 0.15 0.16 x 2 0.04 0.06 0.10 3 0.05 0.10 0.01 x-1.52 and 1.85 0x = 0.7547 ,and Oy 0.8170 The covariance of X and Y is independent . The coefficient of correlation is isThe variables X andY . The expected value of + Y is , and the variance of X+Yis To be accepted to a particular postgraduate course, a student must have a combined score of 4 on the qualifying exam. What is the probability that a randomly selected exam taker qualifies for the course? O0.51 0.49 0.45 0.48 According to Chebysheff's Theorem, there is at least a 0.75 probability that a randomly selected exam taker has a combined score between and 09818 1.0122 .0435 0.9524 QNA3.16 С, 2004-2016 Aplia. A" rightsreserved ming except as noted. All rights reserved Grade It Now Save & Continu , According to Chebysheff's Theorem, there is at least a 0.75 probability that a randomly selected exam taker has a combined score between and 5.8104 6.0452 5.9266 5.6965

Answer 1

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