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AP Statistics Flashcards: Potential Errors When Performing Tests

Study Potential Errors When Performing Tests in AP Statistics with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

Identify the potential error: performing a zz test for a mean when σ\sigma is unknown.

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ANSWER

Use a tt test when σ\sigma is unknown. Population SD rarely known; sample SD requires t-distribution for proper inference.

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AP Statistics: Inference for Categorical Data: Proportions

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What this deck covers

This deck focuses on Potential Errors When Performing Tests, giving you a quick way to review the definitions, rules, and examples that matter most for AP Statistics.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 50Practice questions for this set
A manufacturer tests whether the mean lifetime of a battery is greater than 8 hours. They test H0:μ=8H_0: \mu=8 vs. Ha:μ>8H_a: \mu>8 at α=0.05\alpha=0.05. The test result is to reject H0H_0 and claim the mean lifetime exceeds 8 hours. In reality, the true mean lifetime is μ=8.6\mu=8.6 hours. Which type of error was made?
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