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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 97 times)

Jkov05

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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
Stats: Modeling the World ¦ Bock, Velleman, De Veaux ¦ 4th Edition
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juicepod

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Reply #1 on: Jul 25, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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Jkov05

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Reply 2 on: Jul 25, 2018
Gracias!

phuda

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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