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Chi-Square
- When to use Chi-square
- The hypothesis predicts a
difference or an association
- The sets of data are independent
- The data is nominal
- The hypothesis predicts a
difference or an association
- How to use Chi-Square
- Step 1. State the alternative and
null hypothesis
- Step 2. Draw up a contingency table
- Step 3. Find the observed value by
comparing observed and expected
frequencies for each cell
- Step 4. Add all the values
in the final column
- Step 5. Find the critical value
of chi-square
- Step 6. Sate the conclusion
- Step 1. State the alternative and
null hypothesis
- gReateR
- The observed value needs to be
greater than the critical value
- The observed value needs to be
greater than the critical value
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