Book Image

Data Science for Marketing Analytics

By : Tommy Blanchard, Debasish Behera, Pranshu Bhatnagar
Book Image

Data Science for Marketing Analytics

By: Tommy Blanchard, Debasish Behera, Pranshu Bhatnagar

Overview of this book

Data Science for Marketing Analytics covers every stage of data analytics, from working with a raw dataset to segmenting a population and modeling different parts of the population based on the segments. The book starts by teaching you how to use Python libraries, such as pandas and Matplotlib, to read data from Python, manipulate it, and create plots, using both categorical and continuous variables. Then, you'll learn how to segment a population into groups and use different clustering techniques to evaluate customer segmentation. As you make your way through the chapters, you'll explore ways to evaluate and select the best segmentation approach, and go on to create a linear regression model on customer value data to predict lifetime value. In the concluding chapters, you'll gain an understanding of regression techniques and tools for evaluating regression models, and explore ways to predict customer choice using classification algorithms. Finally, you'll apply these techniques to create a churn model for modeling customer product choices. By the end of this book, you will be able to build your own marketing reporting and interactive dashboard solutions.
Table of Contents (12 chapters)
Data Science for Marketing Analytics
Preface

Model Evaluation


When we train our model, we usually split our data into a training and testing datasets. This is to ensure that the model doesn't overfit. Overfitting refers to a phenomena where a model performs very well on the training data, but fails to give good results on testing data, or in other words, the model fails to generalize.

In scikit learn, we have a function known as train_test_split that splits the data into training and testing sets randomly.

When evaluating our model, we start by changing the parameters to improve the accuracy as per our test data. There is a high chance of leaking some of the information from the testing set to our training set if we optimize our parameters using only the testing set data. In order to avoid this, we can split data into three parts—training, testing, and validation sets. However, the disadvantage of this technique is that we will be further reducing our training dataset.

The solution is to use cross-validation. In this process, we do not...