#### Overview of this book

Businesses today operate online and generate data almost continuously. While not all data in its raw form may seem useful, if processed and analyzed correctly, it can provide you with valuable hidden insights. The Data Analysis Workshop will help you learn how to discover these hidden patterns in your data, to analyze them, and leverage the results to help transform your business. The book begins by taking you through the use case of a bike rental shop. You'll be shown how to correlate data, plot histograms, and analyze temporal features. As you progress, you’ll learn how to plot data for a hydraulic system using the Seaborn and Matplotlib libraries, and explore a variety of use cases that show you how to join and merge databases, prepare data for analysis, and handle imbalanced data. By the end of the book, you'll have learned different data analysis techniques, including hypothesis testing, correlation, and null-value imputation, and will have become a confident data analyst.
Preface
1. Bike Sharing Analysis
Free Chapter
2. Absenteeism at Work
3. Analyzing Bank Marketing Campaign Data
4. Tackling Company Bankruptcy
5. Analyzing the Online Shopper's Purchasing Intention
6. Analysis of Credit Card Defaulters
7. Analyzing the Heart Disease Dataset
8. Analyzing Online Retail II Dataset
9. Analysis of the Energy Consumed by Appliances
10. Analyzing Air Quality

# Exploratory Data Analysis

In your typical data science project, the majority of your time will be spent investigating the data to find hidden patterns and outliers, often by plotting them in a visualization. This process is called Exploratory Data Analysis (EDA) and, through summary statistics, allows you to uncover underlying data structures and test your hypotheses.

We can split exploratory data analytics into three parts:

• Univariate analysis
• Bivariate analysis
• Linear relationships

Let's look at each of these analysis techniques in detail.

## Univariate Analysis

Univariate analysis is the simplest form of analysis and is where we analyze each feature (column of a DataFrame) and try to uncover the pattern or distribution of the data. In this section, we will be looking at the following features:

• Revenue column
• Visitor type
• Traffic type
• Region
• Weekend-wise distribution
• Browser and operating system