0, within statistical error.
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A correlation coefficient cannot exceed 1.
No! Correlation by itself is not sufficient to infer or prove causation.
The coefficient of nondetermination is found by 1.00-r squared so 1.00-0.35X0.35 1.00-0.1225 0.8772 round it to 0.88
They equal a minus and two +'s or two -'s equal a + :)
"If coefficient of correlation, "r" between two variables is zero, does it mean that there is no relationship between the variables? Justify your answer".