Chi-square test Flashcards

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1
Q

Checklist

A

Nominal data
Independent measures design
Test for difference

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2
Q

Calculation steps

A
  1. Assign each cell a letter (A, B, C etc) – value is observed value o
  2. Calc row, column and overall totals
  3. For each cell expected frequency
    e= (Row total ×Column total)/
    (Overall total)
  4. Then calculate X^2 for each cell

X^2=∑(o-e)^2/e

  1. Add them all up for calculated value of X^2
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3
Q

Critical value

A

Check critical value table based on 1-tailed/2-tailed hypothesis, significance level and degrees of freedom df = (rows-1)(columns-1)

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4
Q

Significance Statement

A

If the calculated X^2 value is greater than or equal to the critical X^2 value the result is significant = reject Null Hypothesis.
If the calculated X^2 value is less than the critical X^2 value the result is not significant = accept Null Hypothesis.

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