# Probability and Statistics Topics

## Probability and Statistics explanations, examples, practice problems. Ready? Let’s do this.

#### Types of Data

The Merriam-Webster dictionary says that data is "factual information used as a basis for reasoning, discussion, or calculation." If we observe something and write down what we observe, we're gathe...

#### Analysis of Single-Variable Data

Univariate, or single-variable, data is usually given as a list of numbers. It's the type of list you'd take with you to the store if you had to go number shopping and were afraid you would forget...

#### Pictures of Single-Variable Data

Who doesn't like pictures? Nobody! There's only one little thing we need to cover before we come to the good stuff, though:ListsOne simple way to look at single-variable data is to write it down in...

#### Bivariate Data

Bivariate data is data where two values are recorded for each observation (as opposed to univariate data). We could look at a bunch of cars in a parking lot, write down both their manufacturers and...

#### Probability

#### Factorials, Permutations, and Combinations

To find probabilities of more complicated events, we'll need some more powerful ways of counting things. Sit down and buckle up, because stuff's about to get real.

#### In the Real World

As for the statistics part, you can actually make a living out of doing statistics. In fact, there are even statistics about statisticians.As for probability, here's a fun yet oddly practical subje...