Probability and Statistics

Probability and Statistics

1. Probability

   • Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates impossibility of the event and 1 indicates certainty

2. Experiment

   • An experiment is a controlled study in which the researcher attempts to understand cause-and-effect relationships. The study is "controlled" in the sense that the researcher controls how subjects are assigned to groups and which treatments each group receives.

3. Sample Space

   • In probability theory, the sample space (also called sample description space[1] or possibility space of an experiment or random trial is the set of all possible outcomes or results of that experiment.

4. Event

   • An event is a subset of a sample space - one or more sample points .

5. Mutually esclusive events

   • Two events are mutually exclusive if they cannot occur at the same time. Another word that means mutually exclusive is disjoint.