1. What type of variables are used for the chi-square test? List an example of one (2 pts)

2. Use the Chi-Square test procedure to solve the following research question: A psychologist seeks to examine whether certain mental health issues are more prevalent in a sample of violent criminal offenders (1,000) compared to the average population.

Observed Expected

Anxiety Disorder 152 146 (14.6 x 1000)

Mood Disorders 112 80 (8.0 x 1000)

Personality Disorders 195 90 (9.0 x 1000)

Schizophrenia 75 15 (1.5 x 1000)

None 521 669 (66.9 x 1000)

2a. Calculate and provide the chi-square statistic for this data (4 pts)

2b. State the degrees of freedom and determine if the test is significant (2 pts)

3a. Calculate and provide the Effect size (phi coefficient) for the test (2 pts)