In Exercise 5.18, Y1 and Y2 denoted the lengths of life, in hundreds of hours, for components of types I and II, respectively, in an electronic system. The joint density of Y1 and Y2 is f (y1, y2) = (1/8)y1e(y1+y2)/2, y1 > 0, y2 > 0, 0, elsewhere. One way to measure the relative efficiency of the two components is to compute the ratio Y2/Y1. Find E(Y2/Y1). [Hint: In Exercise 5.61, we proved that Y1 and Y2 are independent.]

Keerthana Senthil Chessock AP Gov 3 Virginia’s Gubernatorial Race: Where Things Stand With Less Than a Month to Go Questions 1. What types of voters are (hint: demographics) are expected to turn out for this off year election in VA and why does this matter for the candidates The gubernatorial electorate will likely be older, whiter, wealthier and more educated due to the factors...