Suppose When Disposable Personal Income Increases from $10,000 to $15,000

question 208

Multiple Choice

Suppose when disposable personal income increases from $10,000 to $15,000, consumption increases from $9,000 to $12,000. What is the marginal propensity to save?

• A) 0.2
• B) 0.4
• C) 0.6
• D) 0.8

Understand the concept of regression toward the mean and its implications for experimental design.

Recognize the importance of and methods for establishing construct validity in the absence of random assignment.

Identify when and how to apply interrupted time series design and its variations for research.

Distinguish selection biases and their impact on the internal and external validity of a study.

---

Definitions:

Aerobic Respiration

A process of producing cellular energy involving oxygen. Cells break down food in the mitochondria in a long, multi-step process that produces roughly 36 ATP molecules.

Organic Materials

Matter that has come from a recently living organism; it is capable of decay or the product of decay, or is composed of organic compounds.

Decomposer

Decomposers are organisms, such as fungi and bacteria, that break down dead or decaying organisms, playing a crucial role in nutrient cycling and ecosystem functioning.

Parent Material

is the underlying geological material (generally bedrock or a superficial or drift deposit) in which soil horizons form.