STAT 206 Lecture Notes - Lecture 4: Contingency Table, Descriptive Statistics, Conditional Probability
Document Summary
Principles of probability bridge the worlds of descriptive statistics inferential statistics. Given that family plans to purchase, what is the probability that they actually purchase. Probability numerical representation of chance, likelihood, possibility of an outcome occurring. A priori(theoretical)- determined by knowledge of a process coin toss/dice/draw a card. Probability of an occurrence (outcome)- number of ways an event can occur/total number of outcomes . x/t. Definitions: sample space- collection of unique outcomes of a random circumstance (flip a coin or roll dice) Event- an outcome or a set of outcomes in an experiment (head results of flipping a coin, odd numbers when rolling dice) Joint event has two or more characteristics or outcomes. Complement if a is an event, the complement of a includes all events that are not a part of a. Complement of a- set of all outcomes that are not in a.
