Introduction to statistics
Practice Flashcards
Population
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All Flashcards in Topic 4.1
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4.1.18 cards
Population
Entire group studied
Total group
Sample
Subset selected for study
Portion
Random Sample
Equal probability selection
Each member equal chance
Why sampling?
Saves time, cost, resources
Practical
Bias sources
Non-random selection excludes members
Selection method
Example
Population: 2000 students. Sample: 200 random
School study
Representativeness
Sample accurately reflects population
Quality
IB emphasis
Expects random selection to minimize bias
IB focus
Topic 4.1 study notes
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