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## Course overview

In this course, we’ll build on the fundamentals of probabilities, including the theoretical and empirical probabilities, the probability rules ( the addition rule and the multiplication rule), and the counting techniques (the rule of product, permutations, and combinations).

You’ll learn to assign probabilities to events based on certain conditions by using conditional probability rules, to assign probabilities to events based on whether they are in a relationship of statistical independence or not with other events, and to assign probabilities to events based on prior knowledge by using Bayes’s theorem. You’ll also learn to create a spam filter for SMS messages using the multinomial Naive Bayes algorithm.

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

## Key skills

- Assigning probabilities based on conditions
- Assigning probabilities based on prior knowledge
- Assigning probabilities based on event independence
- Creating spam filters using multinomial Naive Bayes

## Course outline

### Introduction to Conditional Probability in Python [5 lessons]

### Conditional Probability: Fundamentals 1h

Lesson Objectives- Define conditional probability
- Assign probabilities based on conditions
- Employ standard notation for conditional probability

### Conditional Probability: Intermediate 2h

Lesson Objectives- Define conditional probability rules
- Employ the multiplication rule
- Identify statistical independence between events

### Bayes Theorem 1h

Lesson Objectives- Assign probabilities based on prior knowledge
- Employ Bayes' Theorem
- Employ the law of total probability

### The Naive Bayes Algorithm 2h

Lesson Objectives- Explain how a spam filter works
- Employ the Naive Bayes algorithm
- Define the multinomial Naive Bayes algorithm

### Guided Project: Building a Spam Filter with Naive Bayes 2h

Lesson Objectives- Create a spam filter using multinomial Naive Bayes
- Expand your portfolio using conditional probability and Naive Bayes
- Employ conditional probability concepts

## Projects in this course

### Building a Spam Filter with Naive Bayes

For this project, we’ll step into the role of data scientists to build an SMS spam filter using the Naive Bayes algorithm. We’ll clean text data and calculate probabilities to classify messages.

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