Give an example of a pair of variables that have a positive correlation, a pair of variables that have a negative correlation, and a pair of variables that have zero correlation
What will be an ideal response?
A person's IQ and his or her telephone number are likely to show zero correlation. The number of winter coats sold and the temperature outside are likely to show a negative correlation. The quantity of fertilizers used and crop yield (e.g., the number of bushels of wheat grown per acre) are likely to have a positive correlation.
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Constantine purchased 100 shares of IBM stock several years ago for $150 per share. The price of these shares has fallen to $55 per share. Constantine's investment strategy is "buy low, sell high"
Therefore, he will not sell his IBM stock until the price rises above $150 per share. If he sells at a price lower than $150 per share he will have "bought high and sold low." Constantine's decision: A) is correct and shows a solid command of the nature of opportunity cost. B) is incorrect because the original price paid for the shares is a sunk cost and should have no bearing on whether the shares should be held or sold. C) is incorrect because when the price of a stock falls, the law of demand states that he should buy more shares. D) is incorrect because it treats the price of the shares as an explicit cost.
Laissez-faire capitalism is characterized by:
A. Very limited government role in the economy B. Active government intervention in the economy C. Individuals and firms abiding by a government economic plan D. A very fair distribution of income and wealth