Question

four students in ms. altons class shared the correlation coefficients derived from their data as follows. student a r = -0.87 student b r = -0.78 student c r = 0.79 student d r = 0.86 whose data had the strongest correlation? student a student b student c student d

Explanation:

Step1: Recall correlation - r concept

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

Step2: Calculate absolute - values

For Student A: \(|r_A|=|- 0.87| = 0.87\); for Student B: \(|r_B|=|-0.78| = 0.78\); for Student C: \(|r_C|=|0.79| = 0.79\); for Student D: \(|r_D|=|0.86| = 0.86\).

Step3: Compare absolute - values

\(0.87>0.86>0.79>0.78\).

Answer:

Student A