A coefficient of zero means there is no correlation between two variables. A coefficient of -1 indicates strong negative correlation, while +1 suggests strong positive correlation.
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A correlation coefficient of zero means that two things are not correlated to each other.
If the correlation coefficient is 0, then the two tings vary separately. They are not related.
"If coefficient of correlation, "r" between two variables is zero, does it mean that there is no relationship between the variables? Justify your answer".
Yes it can be a correlation coefficient.
No, it cannot be a correlation coefficient.