CompTIA Data+ Study Guide

Chapter 5Data Analysis and Statistics

THE COMPTIA DATA+ EXAM TOPICS COVERED IN THIS CHAPTER INCLUDE:

• Domain 3.0: Data Analysis
• 3.1. Given a scenario, apply the appropriate descriptive statistical methods
• 3.2. Explain the purpose of inferential statistical methods
• 3.3. Summarize types of analysis and key analysis techniques

In Chapter 4, “Data Quality,” you learned where data comes from, when quality issues crop up and how to mitigate them, and techniques to prepare data for analysis. Once you have good, clean data, you are ready to develop insights. An insight is a new piece of information you create from data that then influences a decision.

While it's possible to make decisions using intuition, it is preferable to be analytical ...