For a Discrete Random Variable X, Which of the Following $\sum f \left( x _ { i } \right)$

question 11

Multiple Choice

For a discrete random variable X, which of the following computes the expected value?

• A) \(\sum f \left( x _ { i } \right)\)
• B) \(\sum _ { i = 1 } ^ { \infty } x _ { i } f \left( x _ { i } \right)\)
• C) \(\sum _ { i = 1 } ^ { \infty } x _ { i }\)
• D) \(\sum ^ { f ( x ) }\)

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Definitions:

Life Expectancy

The average number of years an individual is expected to live, based on statistical averages of age-specific death rates.

Wear-and-Tear Theory

A concept in aging that suggests the body deteriorates progressively due to accumulated damage from environmental factors.

Maximum Life Span

The longest period that members of a species can live under ideal circumstances.