All of the following are true about the phi coefficient EXCEPT: A)it is very closely related to the correlation coefficient B)it is the same as the correlation coefficient squared (r²) C)it is the Greek letter "φ" D)it is equal to the square root of χ²/N

Question

Quizplus · Accepted Answer

The phi coefficient is related to, but not the same as, the correlation coefficient. Option B is incorrect as it presents an equation for the squared Spearman's correlation coefficient, rather than phi coefficient. The correct equation for the phi coefficient is: (ad – bc) / √(a+b)(c+d)(a+c)(b+d), where a, b, c, and d represent the frequencies in a 2x2 contingency table. Option C is true, as phi is represented by the Greek letter "φ". Option D is a correct equation, but it represents the formula for calculating the chi-square test statistic, not the phi coefficient.

All of the Following Are True About the Phi Coefficient