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AP Statistics Flashcards: Chi Square Goodness Of Fit Test

Study Chi Square Goodness Of Fit Test in AP Statistics with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What is the consequence if expected frequencies are less than 5?

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ANSWER

Chi-Square test may not be valid. Violates assumptions needed for valid statistical inference.

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AP Statistics: Inference for Categorical Data: Chi-Square

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What this deck covers

This deck focuses on Chi Square Goodness Of Fit Test, giving you a quick way to review the definitions, rules, and examples that matter most for AP Statistics.

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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 wildlife biologist expects, based on a long-term model, that sightings of a bird species across 5 habitats occur in proportions: 0.15 Wetland, 0.25 Forest, 0.20 Grassland, 0.30 Shrubland, 0.10 Urban. In a random sample of 500 sightings, the observed counts are: Wetland 92, Forest 118, Grassland 93, Shrubland 146, Urban 51. A chi-square goodness-of-fit test gives pp-value = 0.049. Expected counts under H0H_0 are: Wetland 75, Forest 125, Grassland 100, Shrubland 150, Urban 50. What conclusion is appropriate at α=0.05\alpha=0.05?
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