THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 69

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
A professor of statistics is interested in studying the relationship between the number of hours graduate students spent studying for his comprehensive final exam and the exam score.The results of the regression analysis of hours studied on exam scores are presented below.
-If the least squares regression line = -2.88 + 1.77x and the coefficient of determination is 0.81,the coefficient of correlation is:

• A)-0.88
• B)+0.88
• C)+0.90
• D)-0.90

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Definitions:

Hypochondriac

An individual who excessively worries about having a serious illness despite medical reassurance to the contrary.

Experimental Manipulation

An experimental technique that involves changing one variable to determine if there is an effect on another variable.

Persuasive Speech

A form of communication aimed at convincing the audience to adopt a particular viewpoint or take a specific action.

Cognitive Dissonance Theory

A theory suggesting that individuals experience discomfort (dissonance) when their beliefs or behaviors are inconsistent, leading them to make changes to reduce this discomfort.