The Atomic Mass of an Element

question 3

Multiple Choice

The atomic mass of an element

• A) is determined by the number of protons and neutrons contained in the nucleus.
• B) equals the number of protons plus the number of electrons.
• C) equals the number of neutrons.
• D) changes after each reaction.
• E) depends on the number of electrons in the outermost shell.

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Definitions:

Demographic Variables

Characteristics of subjects that are often used to segment populations, such as age, gender, income, and education.

Significance Level

A rephrased version: The critical value that defines the cutoff for statistical significance in testing hypotheses, representing the risk of concluding a false positive.

Multiple Regression

A statistical tool that uses multiple variables as inputs to project the outcome of a related response variable.

Stepwise Regression

A method of regression analysis that involves automatically adding or removing predictor variables to a model to optimize some criterion.