Chi-Squared Tests Flashcards

(3 cards)

1
Q

Goodness of Fit Test

A

probability that sample of categorical data comes from predetermined population
Ho= predetermined distribution is true

1.determine expected values
2. calculate x2 stat
3.x2 value is LB in x2cdf ->p-value
4. Reject/Faile to reject Ho

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2
Q

Chi-Squared Distribution

A

right skewed, unimodal

x2cdf to calculate p-value

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3
Q

Test for Homogeneity

A

test whether multiple populations/treatments have the same TRUE distribution
Ho= no difference between [variables] for [populations]

  1. expected values (row total*column total/table total)
    2.calculate x2 for each cell
    3.calculate p-value using x2cdf (df=(columns-1)(rows-1))
  2. evaluate
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