Book Image

Statistics for Data Science

Book Image

Statistics for Data Science

Overview of this book

Data science is an ever-evolving field, which is growing in popularity at an exponential rate. Data science includes techniques and theories extracted from the fields of statistics; computer science, and, most importantly, machine learning, databases, data visualization, and so on. This book takes you through an entire journey of statistics, from knowing very little to becoming comfortable in using various statistical methods for data science tasks. It starts off with simple statistics and then move on to statistical methods that are used in data science algorithms. The R programs for statistical computation are clearly explained along with logic. You will come across various mathematical concepts, such as variance, standard deviation, probability, matrix calculations, and more. You will learn only what is required to implement statistics in data science tasks such as data cleaning, mining, and analysis. You will learn the statistical techniques required to perform tasks such as linear regression, regularization, model assessment, boosting, SVMs, and working with neural networks. By the end of the book, you will be comfortable with performing various statistical computations for data science programmatically.
Table of Contents (19 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Deductive correction


With deductive reasoning, one uses known information, assumptions, or generally accepted rules to reach a conclusion. In statistics, a data scientist uses this concept (in an attempt) to repair inconsistencies and/or missing values within a data population.

To the data developer, examples of deductive correction include the idea of converting a string or text value to a numeric data type or flipping a sign from negative to positive (or vice versa). Practical examples of these instances are overcoming storage limitations such as when survey information is always captured and stored as text or when accounting needs to represent a numeric dollar value as an expense. In these cases, a review of the data may take place (in order to deduce what corrections—also known as statistical dataediting—need to be performed), or the process may be automated to affect all incoming data from a particular data source.

Other deductive corrections routinely performed by the data scientists...