StudyToCert

All certifications / Data+ / Lessons

CompTIA Data+ DA0-002 · Domain 3: Data analysis

Descriptive statistics in practice: counts, frequencies, percentages, percent change and ratios

▶ Watch the overview video

Last reviewed September 25, 2026 · Leer en español

Most everyday analysis relies on simple descriptive statistics: how many, how often, what share, and how much things changed. They are easy to calculate and surprisingly easy to get wrong, so the exam checks that you use them correctly.

Free account

Keep reading for free

Create a free StudyToCert account to read the rest of this lesson: 5 more sections, 4 key terms, a real-world example, an exam tip and self-check questions. Every lesson, lab and practice test is free with an account.

Sign up free Log in

Study Data+ for free
A week-by-week plan with every lesson, quizzes, checkpoint tests, a practice exam and hands-on labs.
Open the Data+ study plan