Let X and Y be two positive independent continuous random variables with the probability density functions f1(x) and f2(y), respectively. Find the probability density function of U = X/Y. Hint: Let V = X; find the joint probability density function of U and V . Then calculate the marginal probability density function of U.

T wo quantitative variables: Linear Regression Purpose: How to use one variable to predict the other when there is a linear trend. Linear regression: process of fitting a line to a set of data, the line of best fit is called the regression line. Equation for a line: y=a+bx, where a is the y-intercept and b represents the slope of the line. Finding the regression line means finding...