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The test statistic for the chi-square tests in our textbook requires, for each category, an expected frequency of at least
Piaget
Jean Piaget was a Swiss psychologist known for his pioneering work in child development, particularly his theory of cognitive development that describes how children construct a mental model of the world.
Formal Operations
The stage in Piaget's theory of cognitive development where individuals are able to think abstractly and reason logically.
Concrete Operations
A stage in Piaget's theory of cognitive development where children gain the ability to think logically about physical objects and events.
Sensorimotor
Pertaining to the development phase where an infant's understanding of the world is based on sensory experiences and the motor actions they perform.
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