Exhibit 3-5
You are given the following frequency distribution. 
-Refer to Exhibit 3-5. The standard deviation is
Definitions:
Preoperational
Refers to a stage in Piaget's theory of cognitive development, where children aged 2 to 7 years use symbols to represent their earlier sensorimotor discoveries but lack the ability to perform operations or use logic.
Cognitive Development
The process through which a person's ability to think, understand, and learn evolves over the course of their life, starting from infancy.
Symbolic Functions
Cognitive operations that enable a person to use symbols, signs, or objects to represent something that is not physically present.
Preoperational Stage
A stage in Piaget's theory of cognitive development, typically from ages 2 to 7, characterized by symbolic thinking, egocentrism, and difficulty understanding conservation.
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