In the Are You Equipped? Section at the Beginning of the Chapter

question 44

Multiple Choice

In the Are You Equipped? section at the beginning of the chapter, a study was described looking at the relationship between birth weight and adolescent depression.The participants were divided into groups based on their birth weight, either low or normal birth weight.How many levels of the independent variable were there in this study?

• A)1
• B)2
• C)3
• D)4

---

Definitions:

Base

Substances that accept protons according to the Brønsted-Lowry definition or donate electrons according to the Lewis definition, often part of chemical reactions as reactants.

IR Spectroscopy

A technique used to identify molecular vibrations by measuring the absorption of infrared radiation, useful in determining molecular structure.

N-Butylamine

A primary amine with the formula CH3(CH2)3NH2, used in various industrial and chemical processes.

Diethylamine

An organic compound, a secondary amine with the formula (C2H5)2NH, widely used as a building block in organic synthesis.