Coefficient of correlation(r) value range:

Coefficient of correlation(r) value range:

Coefficient of correlation(r) value range:

A. 0~+1

B. -1 ~ +1

C. 0~∞

D. -∞~+∞

Answer: B

Rationale: r=+1 full positive correlation; r=-1 full negative correlation; r=0 no linear correlation.