If X Is a Normal Random Variable with a Standard

question 65

Short Answer

If X is a normal random variable with a standard deviation of 10, then 3X has a standard deviation equal to: $\begin{array}{|l|l|}\hline\text { A. } & 10 . \\\hline \text { B. } & 13 . \\\hline \text { C. } & 30 . \\\hline \text { D. } & 90 . \\\hline\end{array}$

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Definitions:

Afraid of Flying

A phobia characterized by intense fear or anxiety triggered by the thought of air travel, potentially leading to avoidance of flying.

Systematic Desensitization

A behavioral therapy technique used to help individuals overcome phobias or anxiety disorders through graduated exposure to the feared object or situation alongside relaxation exercises.

Elevator Fear

A specific phobia involving a fear of elevators, often related to claustrophobia or fear of heights.