MathematicsChapter 12: Basic Statistics
Median Class
Find n/2 in the CF column.
Learning objectives
- Define and explain median class.
- Apply median class to a focused FBISE question.
- Check the answer for correct terms, evidence, working, and units.
Definition
Find n/2 in the CF column. That class contains the median. Interpolation splits the class width in proportion to how far CF still needs to go.
Where / symbols
- Median Class
- Find n/2 in the CF column. That class contains the median. Interpolation splits the class width in proportion to how far CF still needs to go.
Relationship
- mode = tallest class
Overview
Learn the idea, then use it:
Core Understanding
Find n/2 in the CF column. That class contains the median. Interpolation splits the class width in proportion to how far CF still needs to go.
Examples CF crosses n/2 · median class at n/2 · mode = tallest class · MEDIAN CLASS: Find n/2 in the CF column. That class contains the median. Interpolation splits the class width in proportion to how far
Exam Application
State the correct term, connect it to the chapter rule or evidence, and use a clear example or calculation.
Examples Define first · Show the rule or evidence · Check units, labels, and conclusion
WHAT — MEDIAN CLASS
Find n/2 in the CF column. That class contains the median. Interpolation splits the class width in proportion to how far CF still needs to go.
HOW — Use the idea
Identify what is given, select this topic's rule or evidence, apply it one step at a time, and check the result.
In simple words
Do not merge median class with a neighbouring idea that uses a different definition, rule, or method.
Key points
- CF crosses n/2
- median class at n/2
- mode = tallest class
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.Median Class
Sticky Notes · Quick Revision
Core Idea
- Find n/2 in the CF column.
Key Points
- CF crosses n/2
- median class at n/2
- mode = tallest class
Simple Check
- Explain median class in your own words and connect it to one chapter example.
How to Answer
- Define the idea, show the main rule or evidence, apply it, and check the final statement.
Common Mistake
- Do not merge median class with a neighbouring idea that uses a different definition, rule, or method.
FBISE Exam Tip
- Use the exact term, show working where needed, and include units or labelled evidence.
60-second revision
- Find n/2 in the CF column.
- CF crosses n/2
- median class at n/2
- mode = tallest class
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