The r-value option (D) -0.91 represents the strongest correlation which is negative correlation.
The correlation coefficient is a quantitative method of calculating correlation. It is a statistical concept, which helps in establishing a relation between predicted and actual values obtained in a statistical experiment.
For the given situation,
The options has the r-values, we need to check which option represents the strong correlation.
The relationship between two variables is generally considered strong when their r value is larger than 0.7.
A correlation of r = -0.9 suggests a strong, negative association between two variables.
A negative correlation means that if one variable gets bigger, the other variable tends to get smaller.
Hence we can conclude that the r-value option (D) -0.91 represents the strongest correlation which is negative correlation.
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