Book Image

CompTIA Data+: DAO-001 Certification Guide

By : Cameron Dodd
Book Image

CompTIA Data+: DAO-001 Certification Guide

By: Cameron Dodd

Overview of this book

The CompTIA Data+ certification exam not only helps validate a skill set required to enter one of the fastest-growing fields in the world, but also is starting to standardize the language and concepts within the field. However, there’s a lot of conflicting information and a lack of existing resources about the topics covered in this exam, and even professionals working in data analytics may need a study guide to help them pass on their first attempt. The CompTIA Data + (DAO-001) Certification Guide will give you a solid understanding of how to prepare, analyze, and report data for better insights. You’ll get an introduction to Data+ certification exam format to begin with, and then quickly dive into preparing data. You'll learn about collecting, cleaning, and processing data along with data wrangling and manipulation. As you progress, you’ll cover data analysis topics such as types of analysis, common techniques, hypothesis techniques, and statistical analysis, before tackling data reporting, common visualizations, and data governance. All the knowledge you've gained throughout the book will be tested with the mock tests that appear in the final chapters. By the end of this book, you’ll be ready to pass the Data+ exam with confidence and take the next step in your career.
Table of Contents (24 chapters)
Part 1: Preparing Data
Part 2: Analyzing Data
Part 3: Reporting Data
Part 4: Mock Exams

Understanding heat maps, tree maps, and geographic maps

The final category of visualizations you need to know for the exam is the maps: heat, tree, and geographic. These may or may not be what you would think of when you hear the word map. A map is a visualization that depicts the relationship between different elements based on some variable. A traditional map, a geographic map, shows the distance and direction between separate points so that you can see how to get from one area to another. However, not all maps denote locations in space like a geographic map does. Let’s jump right in and you will see for yourself.

Heat maps

Heat maps are interesting and often colorful. A heat map compares two qualitative variables, almost always scales, and one quantitative variable. These are designed to see whether there is a relationship between the two scales and that relationship is reflected in the changes in the quantitative variable. It will be easier to see one, so let’...