I If the Coefficient of Correlation Is 0

question 61

Multiple Choice

i. If the coefficient of correlation is 0.70, what is the coefficient of determination? ii. If the value of r is -0.88, what does this indicate about the dependent variable as the independent variable increases?
iii. If the correlation between sales and advertising is -0.7, what percent of the variation in sales can be attributed to advertising?

• A) 0.49; it decreases; 0.49.
• B) 0.49; it decreases;0.7.
• C) 0.49; it increases;0.49.
• D) 0.8367; it decreases;0.7.
• E) 0.8367; it increases;0.8367.

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