The Homoskedasticity-Only Estimator of the Variamce Of $\widehat { \beta } _ { 1 }$

question 35

Multiple Choice

The homoskedasticity-only estimator of the variamce of $\widehat { \beta } _ { 1 }$ is

• A) \(\frac { s _ { \hat { u } } ^ { 2 } } { \sum _ { i = 1 } ^ { n } \left( X _ { i } - \bar { X } \right) ^ { 2 } }\)
• B) \(\frac{s_{\hat{u}}}{\sqrt{\sum_{i=1}^{n}\left(X_{i}-\bar{X}\right)^{2}}}\)
• C) \(\frac { s _ { \hat { u } } ^ { 2 } } { \sum _ { i = 1 } ^ { n } X _ { i } ^ { 2 } - \bar { X } }\)
• D) \(\frac { 1 } { n } \times \frac { \frac { 1 } { n - 2 } \sum _ { i = 1 } ^ { n } \left( X _ { i } - \bar { X } \right) ^ { 2 } \hat { u } _ { i } ^ { 2 } } { \left[ \frac { 1 } { n } \sum _ { i = 1 } ^ { n } \left( X _ { i } - \bar { X } \right) ^ { 2 } \right] ^ { 2 } }\)

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Definitions:

Specialized Expertise

Specific, advanced knowledge or skills in a particular field or area of study.

Horizontal Division

The organizational structure that involves dividing a company based on different types of jobs or tasks, leading to departments that are on the same level.

Line Units

Core units or departments in an organization that are directly involved in its primary activities or objectives.

Decentralization

The degree to which the authority to make decisions is given to lower levels in an organization’s hierarchy.