Examlex
The expected value of a random variable X is 115 and the standard deviation is 21.The standard deviation of the random variable Y = 3X − 10 is
Piaget's Theory
A developmental theory proposed by Jean Piaget that outlines how children progress through four stages of cognitive development from infancy to adolescence.
Concrete Operational
Concrete operational stage is a phase in Piaget's theory of cognitive development, where children gain the ability to think logically about concrete, physical objects and events.
Cognitive Development
The process of growth and change in intellectual/mental abilities such as thinking, reasoning, and understanding over the course of a human life.
Formal Operations
The stage in Piaget's theory of cognitive development, typically beginning around age 12, characterized by the ability to think abstractly and logically.
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