Main content
Learn
Statistical questionsStatistical and non statistical questions
Practice
Statistical questionsGet 5 of 7 questions to level up!
Learn
Reasonable samplesIdentifying a sample and populationExamples of bias in surveysExample of undercoverage introducing biasCorrelation and causalityIdentifying bias in samples and surveysSimulation and randomness: Random digit tables
Practice
Valid claimsGet 3 of 4 questions to level up!
Making inferences from random samplesGet 5 of 7 questions to level up!
Identifying the population and sampleGet 3 of 4 questions to level up!
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Picking fairlyTechniques for generating a simple random sampleTechniques for random sampling and avoiding biasSampling methods reviewSamples and surveys
Practice
Using probability to make fair decisionsGet 3 of 4 questions to level up!
Simple random samplesGet 3 of 4 questions to level up!
Sampling methodsGet 5 of 7 questions to level up!
Learn
Types of statistical studiesWorked example identifying experimentWorked example identifying observational studyWorked example identifying sample studyObservational studies and experimentsAppropriate statistical study example
Practice
Types of statistical studiesGet 3 of 4 questions to level up!
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Introduction to experiment designMatched pairs experiment designThe language of experimentsPrinciples of experiment designRandom sampling vs. random assignment (scope of inference)
Practice
Experiment designsGet 3 of 4 questions to level up!

About this unit

Statistics is all about forming questions and gathering data to explore those questions. This unit covers sampling and survey methods, observational studies, and basic experiment design.