CHS Stats - 10.1 Quiz: The Chi-Square Goodness-of-Fit Test

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6 Terms

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What is the test in this section called?

the chi-square goodness-of-fit test

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multinomial experiment

has a fixed number of trials, more than 2 possible outcomes per trial, P(x) is the same for each trial, outcomes are classified as categories

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What does the chi-sqare goodness-of-fit test do?

tests whether a frequency distribution fits an expected distribution

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observed frequences

O; come from sample data; are COUNTED

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expected frequences

E; “calculated” frequency

  • sample size * expected probability (E sub i = n * p sub i)

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Conditions for chi-square goodness-of-fit test

  1. Sample is random

  2. Each expected frequency is greater than or equal to 5 - if not, can combine 2 categories