The joint probability distribution of discrete random variables and is given as follows: Are and independent of each other?
Today, Joe's class took a math quiz consisting of two problems. For a randomly selected student, let be the points earned on the first question and be the points earned on the second question. The joint probability distribution of and is given in the following table:
What is the expected points that a randomly selected student got?
If the joint probability distribution of and is given by as follows: what is
If the joint probability of and is given by as follows: what is
Today, Joe's class took a math quiz consisting of two problems. For a randomly selected student, let be the points earned on the first question and be the points earned on the second question. The joint probability distribution of and is given in the following table:
The students who have earned a total of less than points will be taking a makeup test. What is the probability that a randomly chosen student will be taking a makeup test?