Examlex
Compare and contrast the mantle and crust.
Intermediate Structures
Transient species that form during the steps of a chemical reaction but do not appear in the final reaction products.
Formal Charges
A bookkeeping tool used in chemistry to assign charges to atoms in a molecule, calculated based on the valence electrons an atom is expected to have versus the electrons it actually controls.
Plus Four Estimate
A technique in constructing a confidence interval that adds four to the sample size (two successes and two failures) for estimating proportions with small samples.
Standard Error
A measure of the dispersion of sample mean estimates from the population mean.
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