If X Is a Normal Random Variable with Standard Deviation

question 81

Multiple Choice

If X is a normal random variable with standard deviation 2.50, and if the probability that X is more than 5.95 is .1271 (as shown below) , then what is the mean of X? (Note: the diagram is not necessarily to scale.)

• A)5.8
• B)5.0
• C)4.7
• D)3.1

---

Definitions:

Endorphins

Naturally occurring neurochemicals whose effects resemble those of the opiates.

Psychotherapy

A form of treatment for mental and emotional disorders, utilizing psychological methods and a therapeutic relationship to overcome problems.

Consistent Exercise

Regular physical activity maintained over time, important for achieving and maintaining overall health and fitness.

Inconsistent Exercise

Refers to an irregular or erratic pattern of physical activity, which can diminish the effectiveness of exercise benefits on health and fitness.