The sampling distribution of the ratio of two sample variances 
is said to be F-distributed provided that:
Definitions:
Technological Advance
The development of new technologies or the improvement of existing technologies to enhance productivity, efficiency, or quality in goods and services.
Opportunity Cost
The economic impact of rejecting the following preferable option when deciding.
Positive Statements
Claims that attempt to describe the world as it is.
Normative Statements
Claims that attempt to prescribe how the world should be.
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