________ Research Is Characterized by Original and Direct Investigation

question 33

Multiple Choice

________ research is characterized by original and direct investigation.

• A) Secondary
• B) Quasi-experimental  
• C) Descriptive
• D) Primary
• E) Observational

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Definitions:

Confidence Level

The degree of certainty, usually expressed as a percentage, that a parameter lies within a specified range of values.

Estimation

The process of finding an approximate value of some parameter—such as a mean, variance, or proportion—from a sample data set.

Population Parameters

Numeric characteristics or measures that describe an aspect of a population.

Sample Statistics

Statistics calculated from a subset of the population data, used to estimate population parameters.