Using the Studentized Residuals Ti to Determine Influential Points in a Multiple

question 191

Short Answer

Using the Studentized residuals ti to determine influential points in a multiple regression model with k independent variable and n observations and letting tn-k-2 denote the upper critical value of a two-tail t test with a 0.10 level of significance, Xi is an influential point if a) $| t | < t _ { n - k - 1 }$
b) $| t | > t _ { n - k - 1 }$
c) $\left| t _ { i } \right| < t _ { n - k - 2 }$
d) $\left| t _ { i } \right| > t _ { n - k - 2 }$

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Definitions:

Overexpansion

The rapid and often uncontrollable growth of a business, territory, or economy, which can lead to inefficiency, unmanageability, and financial problems.

American Railroads

A network of rail transport that significantly contributed to the economic development and westward expansion of the United States throughout the 19th and 20th centuries.

Railroad Industry

The railroad industry encompasses companies that operate railroads, which are large networks of track on which trains travel to transport goods and passengers.

Regulation

The government's imposition of rules within a market to promote fairness, stability, and efficiency, often to protect the public interest.