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20. If the Japanese yen was worth $.0035 six months ago and is worth $.0045 today, how much has the yen appreciated or depreciated?
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People with long work hours tend to spend less time with family, and vice versa, so the correlation between “work hours” and “family hours” must be close to 0?
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Which of the following statements is correct?
A. People with long work hours tend to spend less time with family, and vice versa, so the correlation between “work hours” and “family hours” must be close to 0.
B. Typically, men tend to be about 25 pounds heavier than women. Therefore, the correlation between men's weights and women's weights must be positive.
C. A researcher finds the correlation between two variables is close to 0. Then the two variables must be unrelated.
D. Taller people tend to be heavier than shorter people, so the correlation between “height” and “weight” must be positive.
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