Which of These Is Not True of the Correlation R

question 18

Multiple Choice

Which of these is not true of the correlation r between the weight in pounds and gas mileage in miles-per-gallon for a sample of pickup trucks?

• A) r must take a value between -1 and 1.
• B) r is measured in pounds.
• C) If heavier pickup trucks tend to also get lower gas mileage, then r < 0.
• D) r would not change if we measured these trucks in kilograms instead of pounds.
• E) Both "r is measured in pounds" and "r would not change if we measured these trucks in kilograms instead of pounds" are correct.

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