A Researcher Is Examining Motor Skill Development by Observing Children

question 29

Multiple Choice

A researcher is examining motor skill development by observing children at 18 months old,24 months old,and 30 months old.If the researcher uses a longitudinal design and obtains 20 scores for each age,how many children participated in the entire study?

• A)20
• B)40
• C)60
• D)cannot determine without more information.

---

Definitions:

Fiberglass Truck Hoods

Truck hoods made from fiberglass, a lightweight and durable material, used to cover the engine area.

Income Elasticity of Demand

A measure of how much the quantity demanded of a good responds to a change in consumers' income, holding all other factors constant.

Price of Coffee

The cost that consumers pay for coffee, which varies based on factors like quality, origin, and market demand and supply conditions.

Droughts in Brazil

An environmental and economic issue, affecting water supply, agriculture, and energy production among other areas in Brazil.