Setting Up a Chi-Square Goodness of Fit Test

AP Statistics· difficulty 3/5

A goodness-of-fit table has expected counts 30, 25, 12, 4, 3, 2 across six categories.

Expected Counts A B C D E F 30 25 12 4 3 2

What is the recommended remedy?

  • A

    Increase alpha

  • B

    Combine D, E, F into one category to meet expected count >= 5

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  • C

    Use a t-test instead

  • D

    Drop categories with E < 5

Explanation

To satisfy the expected count condition (E >= 5), combine adjacent low-count categories rather than dropping them.

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