The percentage of variation in variable can be accounted for by the other variable is 81%.
What is variation in statistic?
The statistical distance between the values of the observations (data points) is what makes up a measure of variance. There are various ways to measure variation.
What is correlation coefficient?
A statistical indicator of the strength of a linear link between two variables is the correlation coefficient.
The formula of percentage of variation is:
(correlation coefficient × correlation coefficient × 100)%.
Given that the correlation coefficient is 0.90.
Thus the percentage of variation is (0.90 × 0.90 × 100)% = 81%
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