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2. Proportional reasoning - Wikipedia

   en.wikipedia.org/wiki/Proportional_reasoning

   In Piaget's model of intellectual development, the fourth and final stage is the formal operational stage.In the classic book "The Growth of Logical Thinking from Childhood to Adolescence" by Jean Piaget and Bärbel Inhelder formal operational reasoning takes many forms, including propositional reasoning, deductive logic, separation and control of variables, combinatorial reasoning, and ...

3. Proportion (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Proportion_(mathematics)

   A proportion is a mathematical statement expressing equality of two ratios. [1] [2]: =: ... This page was last edited on 7 November 2024, at 09:41 (UTC).

4. Seventh grade - Wikipedia

   en.wikipedia.org/wiki/Seventh_grade

   Seventh grade (also 7th Grade or Grade 7) is the seventh year of formal or compulsory education. The seventh grade is typically the first or second year of middle school . In the United States , kids in seventh grade are usually around 12–13 years old.

5. Probability-proportional-to-size sampling - Wikipedia

   en.wikipedia.org/wiki/Probability-proportional...

   This is proportional to some known quantity so that = =. [ 1 ] : 97 [ 2 ] One of the cases this occurs in, as developed by Hanson and Hurwitz in 1943, [ 3 ] is when we have several clusters of units, each with a different (known upfront) number of units, then each cluster can be selected with a probability that is proportional to the number of ...

6. Proportional cake-cutting - Wikipedia

   en.wikipedia.org/wiki/Proportional_cake-cutting

   The optimal proportional division problem is the problem of finding a proportional allocation that maximizes the social welfare among all possible proportional allocations. This problem currently has a solution only for the very special case where the cake is a 1-dimensional interval and the utility density functions are linear (i.e. u ( x ...

7. Proportionality (law) - Wikipedia

   en.wikipedia.org/wiki/Proportionality_(law)

   Proportionality is a general principle in law which covers several separate (although related) concepts: . The concept of proportionality is used as a criterion of fairness and justice in statutory interpretation processes, especially in constitutional law, as a logical method intended to assist in discerning the correct balance between the restriction imposed by a corrective measure and the ...