A Random Sample of 4 Units Is Taken from a Group

question 62

Short Answer

A random sample of 4 units is taken from a group of 15 items in which 4 units are known to be defective. Assume that sampling occurs without replacement, and the random variable x represents the number of defective units found in the sample.
The mean of the random variable x is:
______________
The variance of the random variable x is:
______________
P(x = 0) = ______________
P(x = 1) = ______________
P(x = 2) = ______________
P(x = 3) = ______________
P(x = 4) = ______________

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Definitions:

Income Distribution

The way in which total income is shared among the owners of different factors of production and across various participants in the economy.

World War II

A global conflict that occurred from 1939 to 1945, involving most of the world's nations and resulting in significant political, social, and economic changes.

Welfare Program

Governmental provision of economic assistance to persons in need.

U.S. Government

The federal government of the United States, comprising the executive, legislative, and judicial branches.