$X$ Is a Normally Distributed Random Variable with a Mean Of Of 4.0

question 20

Multiple Choice

$X$ is a normally distributed random variable with a mean of $4.0$ . Find the standard deviation of the distribution if $59.10 \%$ of the data lies to the right of $3.54$ . (Note: the diagram is not necessarily to scale.)

• A) 2.0
• B) 0.5
• C) 1.0
• D) 1.3

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Definitions:

Cognitive Therapy

A form of therapy designed to identify and change irrational, unproductive ways of thinking and, hence, to reduce negative emotions.

Scientist-Practitioner Gap

The divide between academic research in psychology and its application in clinical practice, highlighting differences in priorities and methodologies.

Psychotherapy

A form of treatment aimed at improving mental health and well-being through talking with a psychologist or other mental health professional.

Control Group

In an experiment, the group that does not receive the treatment under study and is used as a benchmark to measure how the other tested subjects do.