Examlex
The weighted mean is used to determine the mean for samples with unequal sample sizes.
Preoperational
The second stage in Piaget's theory of cognitive development, during which children start to use language to explore and understand their worlds but do not yet comprehend concrete logic.
Clay
A natural, earthy material consisting of fine-grained minerals, typically used in ceramics and construction, and known for its plasticity when wet.
Piaget's Stages
The four stages of cognitive development proposed by Jean Piaget, through which children progress as they grow: sensorimotor, preoperational, concrete operational, and formal operational.
Cry
The act of shedding tears as an emotional response or due to irritation of the eyes.
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