Measures of spread: variance, standard deviation
This sub-topic covers how to quantify the dispersion of data values around the mean using variance and standard deviation, the most widely used measures o…
📖Study Guide
In-depth bilingual notes with worked past paper examples.
✍️Practice Exam
Original questions for this topic: MCQ + FRQ + Application + drag/match.
🎴Flashcards
20+ flashcards: definitions / formulas / pitfalls. Click to flip.
📊Exam Insight Coming Soon
How this topic is distributed across past papers — data that shows what matters.
Ready to get confident with this topic?
Choose your course, revise with illustrated notes and concept cards, then find your gaps with quizzes and mock exams.
Choose your course and start learning
Choose your course, revise with illustrated notes and concept cards, then find your gaps with quizzes and mock exams.
Choose your course and start learning