Sampling Methods
Gujarat Board · Class 11 · Statistics
Quick revision notes for Sampling Methods — Gujarat Board Class 11 Statistics. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Population and Sample - Basic Concepts
- Population is the complete set of all units or items under study
- Sample is a subset of units selected from the population based on definite criteria
- Sample with replacement: Each selected unit is returned to population before next selection
Need for Sampling and Characteristics of Ideal Sample
- Sampling is needed when population size is very large
- Required when units are spread over wide geographical area
- Essential when inspection is destructive in nature
Simple Random Sampling
- Each unit has equal chance of selection
- Units are selected independent of each other
- Population treated as single composite unit
Stratified Random Sampling
- Used for heterogeneous populations
- Population divided into homogeneous strata
- Random sample drawn from each stratum independently
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Sampling Methods covers several key topics that are frequently asked in Gujarat Board Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
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