Book Image

The Data Analysis Workshop

By : Gururajan Govindan, Shubhangi Hora, Konstantin Palagachev
Book Image

The Data Analysis Workshop

By: Gururajan Govindan, Shubhangi Hora, Konstantin Palagachev

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.
Table of Contents (12 chapters)
7. Analyzing the Heart Disease Dataset
9. Analysis of the Energy Consumed by Appliances

Body Mass Index

The Body Mass Index (BMI) is defined as a person's weight in kilograms, divided by the square of their height in meters:

Figure 2.28: Expression for BMI

BMI is a universal way to classify people as underweight, healthy weight, overweight, and obese, based on tissue mass (muscle, fat, and bone) and height. The following plot indicates the relationship between weight and height for the various categories:

Figure 2.29: Body Mass Index categories (source:

According to the preceding plot, we can build the four categories (underweight, healthy weight, overweight, and obese) based on the BMI values:

define function for computing the BMI category, based on BMI value
def get_bmi_category(bmi):
    if bmi < 18.5:
        category = "underweight"