“I liked the interactive environment on Dataquest. The material was clear and well organized. I spent more time practicing than watching videos and it made me want to keep learning.”

## Course overview

In this course, you’ll learn about single and multi-category chi-square tests, degrees of freedom, hypothesis testing, and different statistical distributions.

To learn about hypothesis testing and statistical significance, you’ll work hands-on with multiple datasets on weight loss data — are patients losing weight due to pure luck, or is it a diet pill? You’ll run the numbers and find out!

Best of all, you’ll learn by doing — you’ll practice and get feedback directly in the browser.

At the end of the course, you’ll complete a guided project that asks you to work with data from the American TV show Jeopardy. You’ll analyze text and search for winning strategies. It’s a chance for you to combine the skills you learned in this course, and to showcase a fascinating project in your portfolio.

## Key skills

• Creating testable hypotheses
• Defining regular and multi-category chi-squared tests
• Performing significance testing to understand an outcome's importance
• Handling probability density functions

## Course outline

### Probability Distributions 1h

Lesson Objectives
• Define a probability distribution
• Calculate probabilities
• Define a cumulative probability function

### Hypothesis Testing 1h

Lesson Objectives
• Identify wow hypothesis testing works
• Identify the relations between hypothesis testing, probability and statistics

### Categorical Data and The Chi-Squared Test 1h

Lesson Objectives
• Determine the statistical significance of observing a set of categorical values
• Generate the chi-squared distribution
• Employ R functions for the chi-squared distribution

### Multi category chi-squared tests 1h

Lesson Objectives
• Extend chi-squared to multiple categories
• Calculate the statistical significance of multi-category chi-squared tests

### Guided Project: Winning Jeopardy 1h

Lesson Objectives
• Expand your portfolio with a guided hypothesis testing project
• Employ chi-squared tests to solve real problems

## Projects in this course

### Guided Project: Winning Jeopardy

For this project, we’ll assume the role of a Jeopardy contestant analyzing a dataset of past questions, using chi-squared tests and text analysis in R to identify common categories and develop optimal strategies.

## The Dataquest guarantee

Dataquest has helped thousands of people start new careers in data. If you put in the work and follow our path, you’ll master data skills and grow your career.

We believe so strongly in our paths that we offer a full satisfaction guarantee. If you complete a career path on Dataquest and aren’t satisfied with your outcome, we’ll give you a refund.

## Master skills faster with Dataquest

### Go from zero to job-ready

Learn exactly what you need to achieve your goal. Don’t waste time on unrelated lessons.

Build confidence with our in-depth projects, and show off your data skills.

### Challenge yourself with exercises

Work with real data from day one with interactive lessons and hands-on exercises.

Share the evidence of your hard work with your network and potential employers.

98%
of learners recommend
4.85
Dataquest rating
SwitchUp Best Bootcamps
\$30k
Average salary boost
for learners who complete a path

### Aaron Melton

“Dataquest starts at the most basic level, so a beginner can understand the concepts. I tried learning to code before, using Codecademy and Coursera. I struggled because I had no background in coding, and I was spending a lot of time Googling. Dataquest helped me actually learn.”

### Jessica Ko

#### Machine Learning Engineer at Twitter

“I liked the interactive environment on Dataquest. The material was clear and well organized. I spent more time practicing then watching videos and it made me want to keep learning.”

### Victoria E. Guzik

#### Associate Data Scientist at Callisto Media

“I really love learning on Dataquest. I looked into a couple of other options and I found that they were much too handhold-y and fill in the blank relative to Dataquest’s method. The projects on Dataquest were key to getting my job. I doubled my income!”

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