STA630 Research Methods GDB no 1 fall spring fall 14 November 2011

[Vuhelper]

(Both, the Moderating and Extraneous variables have an influence on the relationshipbetween the dependent and independent variable. Discuss the basis on which we candifferentiate moderating and extraneous variables?)

Moderatingvariable:-
1- strong contingent effecton the independentvariable-dependentvariable relationship.
2-presence of a thirdvariable modifies theoriginal relationship
3-a moderator is aqualitative or quantitativein nature
4-Effect the direction andstrength of relationshipbetween predictor andcriterian variable
5-Moderator effects zeroorder correlation betweentwo variables
6-they don’t add error toexperiment.

ExtraneousVariables
1-conceivably affect on theindependent variable –dependent variablerelationship
2-To identify the truerelationship effect of theextraneous variables mayhave to be controlled
3-Confounding factors isanother nameused for extraneousvariables
4-Extraneous Variablesare undesirable variables
5-They influence theoutcome of an experiment
6- they add error to Read more: GDB of STA630 - Research Methods 1st - Virtual University of Pakistan http://vustudents.ning.com/group/sta630r...z1dqY63CW2