Assume That $z$ Scores Are Normally Distributed with a Mean of 0 and of 0

question 105

Multiple Choice

Assume that $z$ scores are normally distributed with a mean of 0 and a standard deviation of 1 . If $\mathrm { P } ( - \mathrm { a } < \mathrm { z } < \mathrm { a } ) = 0.4314$ , find $\mathrm { a }$ .

• A) \(1.49\)
• B) \(- 0.18\)
• C) \(0.3328\)
• D) \(0.57\)

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Definitions:

Internal Validation

The process of seeking or achieving a sense of validation or approval from oneself rather than from external sources.

Experimental Method

A scientific approach used to test hypotheses under controlled conditions.

Causal Variable

A causal variable is a factor that brings about change in another variable or set of variables, establishing a cause-and-effect relationship.

Correlational Method

A research technique that establishes the relationship (not necessarily causal) between two variables, traditionally denoted x and y, by measuring both variables in a sample of participants.