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### Course: Statistics and probability > Unit 6

Lesson 2: Sampling and observational studies- Reasonable samples
- Valid claims
- Making inferences from random samples
- Identifying a sample and population
- Identify the population and sample
- Examples of bias in surveys
- Example of undercoverage introducing bias
- Correlation and causality
- Identifying bias in samples and surveys
- Simulation and randomness: Random digit tables

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# Valid claims

## Problem

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