Author Question: The correlation between X and Y is r = 0.35. If we double each X value, decrease each Y by 0.20, and ... (Read 95 times)

Jkov05 · **on:** Jul 25, 2018

The correlation between X and Y is r = 0.35. If we double each X value, decrease each Y by 0.20, and interchange the variables (put X on the Y-axis and vice versa), the new correlation

A) is 0.70.
B) is 0.90.
C) cannot be determined.
D) is 0.35.
E) is 0.50.

Question 2

The auto insurance industry crashed some test vehicles into a cement barrier at speeds of 5 to 25 mph to investigate the amount of damage to the cars.

They found a correlation of r = 0.60 between speed (MPH) and damage (). If the speed at which a car hit the barrier is 1.5 standard deviations above the mean speed, we expect the damage to be _?__ the mean damage.
A) 0.60 SD above
B) equal to
C) 0.90 SD above
D) 1.5 SD above
E) 0.36 SD above

juicepod · **Reply #1 on:** Jul 25, 2018

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