Examlex
In some molecules and polyatomic ions,the sum of the valence electrons is odd and as a result the octet rule fails.
Stratified Sampling
A sampling method that divides the population into smaller groups, or strata, to ensure representation of significant subpopulations in the sample.
School Administrator
An official in an educational setting responsible for the management, coordination, and supervision of school operations and activities.
Freshmen
First-year students at a high school, college, or university.
Population Parameter
A characteristic or measure of an entire population, such as the mean or standard deviation, often estimated using sample data.
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