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Unit: Significance tests (hypothesis testing)

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The idea of significance tests

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Simple hypothesis testingGet 3 of 4 questions to level up!
Writing null and alternative hypothesesGet 3 of 4 questions to level up!
Estimating P-values from simulationsGet 3 of 4 questions to level up!

Error probabilities and power

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Type I vs Type II errorGet 3 of 4 questions to level up!
Error probabilities and powerGet 3 of 4 questions to level up!

Tests about a population proportion

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Writing hypotheses for a test about a proportionGet 3 of 4 questions to level up!
Conditions for a z test about a proportionGet 3 of 4 questions to level up!
Calculating the test statistic in a z test for a proportionGet 3 of 4 questions to level up!
Calculating the P-value in a z test for a proportionGet 3 of 4 questions to level up!
Making conclusions in a z test for a proportionGet 3 of 4 questions to level up!

Tests about a population mean

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Writing hypotheses for a test about a meanGet 3 of 4 questions to level up!
Conditions for a t test about a meanGet 3 of 4 questions to level up!
Calculating the test statistic in a t test for a meanGet 3 of 4 questions to level up!
Calculating the P-value in a t test for a meanGet 3 of 4 questions to level up!
Making conclusions in a t test for a meanGet 3 of 4 questions to level up!

More significance testing videos

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About this unit

Significance tests give us a formal process for using sample data to evaluate the likelihood of some claim about a population value. We calculate p-values to see how likely a sample result is to occur by random chance, and we use p-values to make conclusions about hypotheses.