What is Data Science - Complete Guide
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What is Data Science?
Data Science is the practice of extracting insights and knowledge from data using statistics, programming, and machine learning. Data scientists turn raw numbers into decisions.
The Data Science Workflow
- Collect — gather data from sources.
- Clean — fix missing/wrong values (80% of the work!).
- Explore — find patterns (EDA).
- Model — apply ML algorithms.
- Communicate — visualize and present.
Essential Skills
| Skill | Tools |
|---|---|
| Programming | Python, R |
| Data wrangling | Pandas, NumPy |
| Visualization | Matplotlib, Tableau |
| ML | scikit-learn |
| Databases | SQL |
Why It's In Demand
Every company collects data and needs people to make sense of it — data science is among the highest-paying tech careers.
FAQs
Do I need a PhD?
No — strong Python, SQL, statistics, and projects matter more. More in our Data Science guides.
Data Science vs Data Analytics?
Analytics describes what happened; data science also predicts and builds models.