Chi Square Test

Question 1

When do we use Chi square tests?

Answer 1

Explore relationships between 2 categorical variables

Question 2

How do we make a contingency table (list row and column values)

Answer 2

Row: dependent

Column: independent

Question 3

How do you find expected counts?

Answer 3

Row total x column total / grand total

Question 4

How do you find degrees of freedom?

Answer 4

(# rows - 1) (# columns - 1)

Question 5

What are the conditions for a chi square test?

Answer 5

No expected cell counts less than 1, 20% of the cell counts have expected cell counts less than 5

Question 6

Hypotheses

Answer 6

H0: there is no association between ____ and ____

Ha: There is an association between _____ and ____

Question 7

What values do we list for chi square?

Answer 7

Test statistic (chi square =__), p-value

Question 8

Conclusion

Answer 8

There is/isn’t sufficient evidence to support that there is an association between ____ and ____