Which of these r-values represents the strongest correlation? a.-0.8 b.-0.7 c.-0.9 d.-0.6

Answer-

-0.9 represents the strongest correlation

Solution-

Correlation coefficient-

The more closer its absolute value to 1, the stronger the relationship is.

If r is -ve, then the relationship is negative (i.e if one increases then the other must decrease)

If r is +ve, then the relationship is positive (i.e if one increases then the other must increase)

As, in case of -0.9, its absolute value 0.9 is more closer to 1, so it is the strongest correlation (strong-negative correlation)

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