Using the Cook's Distance Statistic Di to Determine Influential Points

question 77

Multiple Choice

Using the Cook's distance statistic Di to determine influential points in a multiple regression model with k independent variable and n observations and letting Fv1,v 2 denote the critical value of an F distribution with v1 and v2 degrees of freedom at a 0.50 level of significance, Xi is an influential point if

• A) D i > F k+1,n-k-1
• B) D i < F n-k-1,k+1
• C) D i < F k+1,n-k-1
• D)D i >F n-k-1,k+1

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Definitions:

Alternate Forms Reliability

The consistency of the results of two tests constructed in the same way from the same content domain, administered to the same participants.

Item-total Correlation

The correlation between scores on individual items and the total score on all items of a test or questionnaire.

Convergent Validity

A measure of the degree to which two different assessments of the same concept are correlated, indicating the validity of the constructs.

Face Validity

The extent to which a test appears to measure what it's supposed to measure, making it seem valid at face value.