I If the Coefficient of Correlation Is 0

question 43

Multiple Choice

i. If the coefficient of correlation is 0.80, what is the coefficient of determination? ii. What is a measure of the scatter of observed values around the regression line called?
iii. If the correlation between sales and advertising is + 0.6, what percent of the variation in sales can be attributed to advertising?

• A) 0.4; standard deviation; 0.3.
• B) 0.64; standard error of the estimate; 36%.
• C) 0.64; standard error of the estimate; 60%.
• D) 0.08; variation; 36%.
• E) 0.4; standard error of the estimate; 60%.

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Definitions:

Caffeine Consumption

The intake of caffeine, typically from foods or beverages, which can stimulate the central nervous system.

Centers For Disease Control (CDC)

A national public health institute in the United States, tasked with protecting public health and safety through the control and prevention of disease, injury, and disability.

Smokers

Individuals who regularly inhale the smoke of tobacco or similar substances.

Cirrhosis

A chronic liver disease marked by degeneration of cells, inflammation, and fibrous thickening of tissue.