Suppose a Random Variable $x$ Is Best Described by a Normal Distribution With

question 114

Multiple Choice

Suppose a random variable $x$ is best described by a normal distribution with $\mu = 60$ and $\sigma = 4$ . Find the $z$ -score that corresponds to the value $x = 45$ .

• A) \(3.75\)
• B) \(- 3.75\)
• C) \(- 4\)
• D) 4

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Definitions:

Nonconcealed observation

A method of observation in which the subjects are aware that they are being observed, potentially influencing their behavior.

Archival studies

Research methods that involve the examination and analysis of historical records and documents to understand past behaviors or trends.

Systematic observation

An observational research method where data is collected in a structured, organized, and methodical manner.

Reactivity

The influence that the process of measuring has on the subjects being measured, potentially affecting the results of a study.