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The following diagram shows three Lorenz curves for countries A, B, and C. The area between the Lorenz curve and the diagonal is 1,000 for Country A, 2,000 for Country B, and 2,500 for Country C. (The entire area under the diagonal is 5,000 because the area of the triangle is ½ × (base × height) = ½ × (100 × 100) = 5,000.)
(1) Calculate the Gini coefficient for each country.
(2) Based on the Gini coefficient, which country has the most equal distribution of income? Which country has the least?
Reliability
The consistency and stability of a test, measurement, or instrument over time or different conditions.
Multiple-choice
A type of question or assessment method that presents respondents with several answer options, allowing them to select one or more as the correct answer.
Rorschach
A projective psychological test consisting of inkblots presented to individuals, who describe what they see, used to assess their personality and emotional functioning.
Validity
The extent to which a test, tool, or research accurately measures what it is intended to measure.
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