Question

which r - value represents the strongest negative correlation? -0.7 -0.22 0.38 0.9

Explanation:

Step1: Recall correlation - r - value concept

The strength of a negative correlation is determined by the absolute - value of the correlation coefficient (r). The closer the absolute - value of r is to 1, the stronger the negative correlation.

Step2: Calculate absolute - values of given r - values

For r = 0.9, |0.9|=0.9 (this is a positive correlation, so we ignore it). For r = 0.38, |0.38| = 0.38 (positive correlation, ignore). For r=-0.22, | - 0.22|=0.22. For r=-0.7, | - 0.7| = 0.7.

Step3: Compare absolute - values for negative r - values

We are comparing 0.22 and 0.7. Since 0.7>0.22, the r - value of - 0.7 represents the stronger negative correlation among the negative r - values.

Answer:

-0.7