Randomization in an Experimental Design Assures

question 27

Multiple Choice

Randomization in an experimental design assures

• A) external validity of the findings.
• B) the relevance of the hypothesis in question.
• C) accurate observation of the dependent variable.
• D) statistical equivalence of groups.
• E) lack of pretest sensitivity.

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Definitions:

Confidence Interval

A stretch of values, resulting from sample analytics, projected to envelop the value of a hidden attribute in a population.

Population Proportion

The ratio of members within a subset to the total number of members in a population.

Stratified Random Sampling

A method of sampling that involves dividing a population into smaller groups, known as strata, that share similar characteristics, and then randomly selecting members from each stratum for study.

Chi-Square Distribution

A statistical distribution used in hypothesis testing that is applicable to variables measured on an interval scale, often used to analyze categorical data.