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. The cost C of replacing the two components depends upon their length of life at failure and is given by C = 50 + 2Y1 + 4Y2. Find E(C) and V(C).

Week 10 8 November 2016 Basic Statistics for Research Professor HK Dong Wendy Liu Population Margin of Error: Conservative margin of error: use Sample size needed to obtain certain margin of error: Statistical methods Descriptive statistics Inferential statistics o Estimation (confidence intervals) o Hypothesis testing Hypothesis testing...