Under what circumstances is the phi-coefficient used?
A) when one variable consists of ranks and the other is regular, numerical scores
B) when both variables consists of ranks
C) when both X and Y are dichotomous variables
D) when one variable is dichotomous and the other is regular, numerical scores
Question 2
A sample of n = 4 scores is obtained from a population with = 70 and = 8. If the sample mean corresponds to a z-score of 2.00, then what is the value of the sample mean?
A) M = 86
B) M = 78
C) M = 74
D) M = 72
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How to solve a linear system when the variable is in the denominator position (Question 1 of 2)