Section 4.1: Sample Space and probability. Basic Concepts A probability experiment is a chance process that leads to well-defined results called outcomes. An outcome is the result of a single trial of a probability experiment. Each repetition of the experiment we call a trial. A sample space is the set of all possible outcomes of a probability experiment. Example # 1: Give a sample space for each of the following experiments: Experiment Sample space Answering a true/false question Roll a die (6 sides) Toss a coin one time The grade received in a course 1st way: (Give two ways in which the space might 2nd way: be forms) Toss a coin two times A tree diagram is a device consisting of a line segments emanating from a starting point and also from the outcome points. It is used to determine all possible outcomes of a probability experiment. Example #2: Find the sample space for the gender of the children if a family has three children. Use a tree diagram.