The Sample Standard Deviations for X and Y Are 10

question 119

Multiple Choice

The sample standard deviations for x and y are 10 and 15, respectively. The covariance between x and y is −120. The correlation coefficient between x and y is ________.

• A) −0.8
• B) −0.5
• C) 0.5
• D) 0.8

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Definitions:

Exchange

The act of trading goods, services, or currencies among parties.

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Forfeiting the immediately lesser choice has a cost attached when decisions are being made.

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Opportunity Cost

The price paid for not selecting the next most favorable choice during decision-making.