**1. What is a Bivariate Normal Distribution?**

The “regular” normal distribution has one random variable;

**A bivariate normal distribution is made up of**The two variables in a bivariate normal are both are normally distributed, and they have a normal distribution when both are added together.

**two**independent random variables.I don't understand why they say two independent variables, when everywhere else it is said that if X and Y follow a bivariate normal distribution they are independent only if the correlation coefficient rho=0. Am I misunderstanding something?