Worked Example
Revision challenge 9
For Class 11 Economics, explain or solve a standard deviation question from the chapter "Measures of Dispersion". Focus on revision challenge and show the working clearly.
Step-by-step solution path
- Read the topic idea: Standard deviation.
- Recall the core explanation from the chapter: Economics syllabus chapter for Class 11.
- Use the related formula "SD = √(Σfd²/N)" as the main tool while solving.
- Write the reasoning in simple school-level language before the final answer.
Final learning answer
This example is centred on Standard deviation. A strong solution should identify the correct data, apply SD = √(Σfd²/N), and explain each transition instead of jumping directly to the answer.
Related formula
SD = √(Σfd²/N)
SD = √(Σfd²/N)