Find the Numerical Value $\left( \begin{array} { l } 20 \\ 20 \end{array} \right)$

question 29

Multiple Choice

Find the numerical value.
- $\left( \begin{array} { l } 20 \\ 20 \end{array} \right)$

• A) 0
• B) 1
• C) 19
• D) 20

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Definitions:

Cross-sectional

An observational study method that examines data collected from a population or a segment that represents the broader group during a particular moment.

Different Ages

Refers to varying stages of life or periods of time characterized by distinct physical, psychological, or social characteristics and experiences.

Investigator

A person who conducts research or carries out an inquiry, especially in a scientific or academic field.

Longitudinal

Longitudinal studies involve repeated observations of the same variables, such as people, over short or long periods of time to detect patterns, causes, and effects.