STAT151 Lecture Notes - Lecture 10: Random Variable

• School: University of Alberta
• Department: Statistics
• Course: STAT151
• Professor: Rosana Fok

Document Summary

Stat 151: lecture 10 - random variables part 1. The notation x (capital x) denotes the value of a random variable. X = the number of tails of tails occurring. It depends on the outcome of a random event. Just like variables, rv can be categorical or quantitative: Discrete random variables - finite number of distinct outcomes i. e. the number of students in a class (you can"t have 5. 5 students) Continuous random variable - a numerical interval of values. i. e. the heights of students in a class (you can have 5 feet, 5. 1 feet, etc. ) Collection of all possible values for an rv. What is the outcome, and the value of each outcome. Toss 2 coins and let x equal the number of heads observed. X = number of heads that occur in each outcome. Tree diagram (the red numbers are the probabilities of each) From this data we can simplify to just this table where.