STAT 400 Midterm: STAT400 FORNI-G SPRING2009 0101 MID EXAM 1

• School: University of Maryland
• Department: Statistics and Probability
• Course: STAT 400
• Professor: All

Document Summary

No notes, calculators, cell phones or electronic devices. Ii) let x and y be independent random variable each with exponential distribution. Assume e(x) = 1 and e(y ) = 2 : find p (x > y ) , find the probability density function of z = x y , find e(z) and v (z) . Iii) among the visitors to a museum 25% are children who pay , 50% are adults who pay the full price of and 25% are seniors who pay . Iv) let x , y be random variables with standard normal distribution.