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Unit: Study design

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Samples and surveys

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Reasonable samples
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Samples and surveys
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Valid claimsGet 3 of 4 questions to level up!
Making inferences from random samplesGet 5 of 7 questions to level up!

Observational studies and experiments

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Types of statistical studies
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Correlation and causality
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Appropriate statistical study example
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Observational studies and experiments
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Types of statistical studiesGet 3 of 4 questions to level up!
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About this unit

Getting reliable data is vital if we want to make correct conclusions.The process of collecting data through studies involves sampling, observations, surveys, and experiments.