Which Statement Is True of Experimental Design

question 14

Multiple Choice

Which statement is true of experimental design?

• A) It is always the best design and should be used whenever possible.
• B) It provides control of all extraneous variables.
• C) It is the best design for evaluating the effectiveness of clinical interventions and treatments.
• D) It works well for small sample sizes.

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Definitions:

Level Of Significance

The threshold for rejecting the null hypothesis in a statistical test, often denoted by alpha and representing the risk of a Type I error.

One-Tail

It refers to tests of significance that determine if there is a relationship or a difference in only one direction, either greater than or less than, but not both.

Test Statistic

A calculated value used in statistical hypothesis testing to determine whether to reject the null hypothesis.

Level Of Significance

The probability of rejecting the null hypothesis in a statistical test when it is actually true; a threshold for determining the statistical significance of a result.