Which correlation should be used to measure the relationship between gender and grade point average for a group of college students? ?

a. ? point-biserial correlation

b. ? pearson correlation

c. ? phi-coefficient

d. ? spearman correlation?

I believe the correct answer would be A. The best correlation to use to measure the relationship between gender and grade point average for a group of college students would be the point-biserial correlation. It is coefficient that is used when a variable is dichotomous or that the variable is part of a whole set. It is used in measuring the direction of the correlation that is present between a dichotomous variable and a continuous variable. From the  question, the dichotomous variable would be the grade point average for a group of college students while the other variable is the continuous one. 

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