A school psychologist surveyed 75 students (both boys and girls) who had been reported as "bullies" and asked them which bullying method they used most often: physical, verbal, psychological, or cyber-bullying. The results and an excerpt from this fictitious study follow:
Excerpt: "Based on a chi-square test for independence, there was a significant association between gender and bullying method, χ 2 (3, N = 75) = 11.85, p

Question

A school psychologist surveyed 75 students (both boys and girls) who had been reported as "bullies" and asked them which bullying method they used most often: physical, verbal, psychological, or cyber-bullying. The results and an excerpt from this fictitious study follow: 
Excerpt: "Based on a chi-square test for independence, there was a significant association between gender and bullying method, χ 2 (3, N = 75) = 11.85, p < .05."
-The phi coefficient for this study is

Quizplus · Accepted Answer

The phi coefficient is a measure of association for two binary variables and is calculated as the square root of the chi-square statistic divided by the sample size. The correct formula does not involve the complex terms seen in options A, B, and C, making option D (√(11.85/75)= .40) the correct calculation for the phi coefficient.

A School Psychologist Surveyed 75 Students (Both Boys and Girls)