Introduction to Probability > Probability Space What is a Probability Space? In order to comprehend a statement like “the probability of rolling a die twice and getting two sixes is about 3%”, you need to specify a probability space. A…

# Probabilistic: Definition, Models and Theory Explained

Statistics Definitions > Probabilistic What is Probabilistic? A probabilistic method or model is based on the theory of probability or the fact that randomness plays a role in predicting future events. The opposite is deterministic , which is the opposite…

# Probability Mass Function (PMF): Easy Definition, Examples

Probability > Probability Mass Function You may find it helpful to read this other article first: Discrete vs. Continuous variables. What is a Probability Mass Function? A probability mass function (PMF) gives you probabilities for discrete random variables. “Random variables”…

# Pairwise Independent, Mutually Independent: Definition, Example

Probability > Mutually Independent and Pairwise Independent Contents: What is Pairwise? Pairwise Averages (Walsh Averages) Pairwise Comparison Pairwise Differences Pairwise Independent / Mutually Independent. Pairwise Statistics Pairwise Slopes What is Pairwise? Pairwise means to form all possible pairs — two…

# Probability Problems: How to Solve Probability Problems the Easy Way!

Probability and Statistics > Probability Index > Probability problems Probability Problems Overview. If you’re taking a class in basic probability, right now you’re probably feeling utterly confused with the rules of probability. After all, there are lots. When do add?…

# Odds Ratio Calculation and Interpretation

Probability and Statistics > Probability > Odds Ratio What is the Odds Ratio? An odds ratio (OR) is a measure of association between a certain property A and a second property B in a population. Specifically, it tells you how…

# Normal Probability Practice Problems and Answers

Probability and Statistics > Probability > Normal Probability Practice Problems These normal probability practice problems will help you practice calculating z-scores and using the z-table. General steps for solving normal probability practice problems: Use the equation above to find a…

# Bayes’ Theorem Problems, Definition and Examples

Probability and Statistics > Probability > Bayes’ Theorem Problems What is Bayes’ Theorem? Bayes’ theorem is a way to figure out conditional probability. Conditional probability is the probability of an event happening, given that it has some relationship to one…

# Fundamental Counting Principle (The Multiplication Counting Rule): How to use it

Probability and Statistics > Probability > Fundamental Counting Principle Fundamental Counting Principle Definition. The Fundamental Counting Principle (also called the counting rule) is a way to figure out the number of outcomes in a probability problem. Basically, you multiply the…

# Sample Space Examples and The Counting Principle

Probability and Statistics > Probability > Sample Space Examples What is a Sample Space? The sample space of an experiment is all the possible outcomes for that experiment. A couple of simple examples: The space for the toss of one…