# Probability and Statistics

### Popular Tutorials in Probability and Statistics

#### How Do You Use a Tree Diagram to Count the Number of Outcomes in a Sample Space?

When you're trying to figure out all the possibilities from different options, it can be helpful to make a tree diagram. In this tutorial, you'll see how to use a tree diagram to figure out how many different outfits can be created from the possible shirts, bottoms, and shoes given. Check it out!

#### How Do You Use the Fundamental Counting Principle to Count the Number of Outcomes in a Sample Space?

When you're trying to figure out all the possibilities from different options, it can be helpful to draw a picture. In this tutorial, you'll see how to use a picture to figure out how many different outcomes can be created from the possibilities given. Check it out!

#### How Do You Find the Probability of a Simple Event?

Working with probabilities? Check out this tutorial! You'll see how to calculate the probability of picking a certain marble out of a bag.

#### How Do You Find the Probability of Independent Events?

Calculating probabilities? Take a look at this tutorial and see how to figure out the probability of independently drawing certain cards from a deck!

#### How Do You Find the Probability of Dependent Events?

Sometimes probabilities depend on the outcomes of other events. Check out this tutorial to see probabilities of dependent events in action!

#### How Do You Find the Mean of a Data Set?

Mean is just another name for average. To find the mean of a data set, add all the values together and divide by the number of values in the set. The result is your mean! To see an example of finding the mean, watch this tutorial!

#### How Do You Find the Median of a Data Set?

The median of a data set is the number that is the middle value of the set. It's easy to find the median if you first put the numbers in order from least to greatest. In this tutorial, see how to find the median of a data set, and see what to do if there are two middle values!

#### How Do You Find the Mode of a Data Set?

The mode of a data set is the number that occurs most frequently in the set. To easily find the mode, put the numbers in order from least to greatest and count how many times each number occurs. The number that occurs the most is the mode! Follow along with this tutorial and see how to find the mode of a set of data.

#### How Do You Find the Range of a Data Set?

The range of a data set is the difference between the largest number and the smallest number. In this tutorial, you'll see how to find the range of a set of data. Check it out!

#### How Do You Find the Mode of a Data Set When There is More Than One Mode?

The mode of a data set is the number that occurs most often, but what if your data set has more than one mode? Is that possible? This tutorial explains what to do when a data set has multiple modes!

#### How Do You Find the Mode of a Data Set Where All The Numbers are Different?

To find the mode of a data set, look for the number that occurs most often. What if all the numbers occur the same number of times? What's the mode of that data set? This tutorial will tell you!

#### How Do You Make a Box-and-Whisker Plot?

A box-and-whisker plot can help you get a better picture of what your data looks like visually. This tutorial shows you the step-by-step process for making a box-and-whisker plot!

#### How Do You Find a Number of Permutations Using the Fundamental Counting Principle?

The Fundamental Counting Principle (FCP) can be used to find a number of permutations. Follow along with this tutorial to see how to use the FCP to find the number ways you can rearrange the letters in the word NUMBER.

#### How Do You Find the Probability of the Complement of an Event?

Probability can help you solve all sorts of everyday problems! This tutorial shows you how to find the probability of the complement of an event using gummy worms!

#### How Do You Use a Simulation to Solve a Problem?

Simulators are a great way to model an experiment without actually performing the experiment in real life. This tutorial looks at using a simulator to figure out what might happen if you randomly guessed on a true/false quiz.

#### What is an Outcome?

When you're conducting an experiment, the outcome is a very important part. The outcome of an experiment is any possible result of the experiment. Learn about outcomes by watching this tutorial!

#### What is a Sample Space?

In an experiment, it's good to know your sample space. The sample space is the set of all possible outcomes of an experiment. Watch this tutorial to get a look at the sample space of an experiment!

#### What is the Fundamental Counting Principle?

The Fundamental Counting Principle is a way to figure out the total number of ways different events can occur. In this tutorial, you'll be introduced to this principle and see how to use it in an example. Take a look!

#### What is Probability?

Probability can help you solve all sorts of everyday problems, but first you need to know what probability is! Follow along with this tutorial to learn about probability!

#### What is the Median of a Data Set?

The median is one of many measures of central tendency. Check out this tutorial to learn what the median is and how you can find it!

#### What is the Mode of a Data Set?

Finding the mode of a set of data can help you understand the data better. This tutorial introduces you to mode and shows you how to find this helpful measure of central tendency!

#### What is the Mean of a Data Set?

When you think of the mean of a data set, think of the word average. 'Mean' and 'average' are the same thing when you're talking about a set of data! This tutorial introduces you to mean and shows you how to find it!

#### What is the Interquartile Range?

Being able to disect a set of data and better understand it is a key part of mastering statistics. This tutorial teaches you about one of these disection tools called the interquartile range.

#### What is Experimental Probability?

Do real life situations always work out the way your mathematical models tell you they should? No! This tutorial describes how experimental probability differs from theoretical probability.

#### What is the Complement of an Event?

When you learn about probablilities, the complement of an event is a must-know term! This tutorial introduces you the complement of an event.

#### What is a Weighted Average?

A weighted average is a special type of average that allows you to give special weights to the different values in your average. Learn more about weighted averages by watching this tutorial!

#### How Do You Find an Average?

What is the average temperature outside today? What is the average amount of time it takes you to do your homework? What is the average price for a gallon of gas? To figure out how to find the average to just about anything, check out this tutorial about averages!

#### How Do You Find Conditional Probability?

Conditional probability is used to find a probability in all sorts of everyday situations! This tutorial shows you one example of how to find the conditional probability in a real world problem.

#### How Do You Find the Standard Deviation of a Data Set?

Organization is a key part of finding the standard deviation of a data set. This tutorial takes you through the entire process one step at a time!

#### What is Conditional Probability?

If you're learning about probability, conditional probability is bound to come up. This tutorial explains conditional probability and shows you how to find it!

#### What is a Normal Distribution?

Ever heard of data following a normal distribution? How do you know if you're data follows normal distribution? This tutorial introduces normal distribution and shows you the characteristics of a normal distribution curve!

#### What is an Unbiased Sample?

When you're trying to learn about a population, it can be helpful to look at an unbiased sample. An unbiased sample can be an accurate representation of the entire population and can help you draw conclusions about the population. This tutorial introduces you to unbiased sampling!