Let $f ( t ) = 0.2 e ^ { - 2 t } , t \geq 0$

question 38

Essay

Let $f ( t ) = 0.2 e ^ { - 2 t } , t \geq 0$ be the probability density function of a random variable T, where t is the time that a customer spends in line at teller's window before being served. What is mean of the probability density function?

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Definitions:

Telepathy

A form of communication where information is transferred between individuals without using the known sensory channels or physical interaction.

Clairvoyance

The claimed capacity to acquire knowledge on objects, individuals, sites, or physical occurrences through channels beyond the conventional human senses.

Precognition

The purported ability to perceive or predict future events before they happen, a phenomenon not supported by scientific evidence.

Lightness Constancy

The perception that the whiteness (lightness) of an object remains the same under varying illumination conditions.