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It mean that there is no correlation between the two variables. The variables are the same.
The correlation coefficient is symmetrical with respect to X and Y i.e.The correlation coefficient is the geometric mean of the two regression coefficients. or .The correlation coefficient lies between -1 and 1. i.e. .
Correlation analysis is the relationship of two values. When two items are similar, they will have a high correlation. Should they differ, they will be much lower in variables.
84.75 is the mean of 88, 91, 74 and 86.
Probably a mis-spelling of "correlation".