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Monday, November 14, 2011

STA630 GDB Solution


Total Marks                  20
Starting Date                 Monday, November 14, 2011
Closing Date                  Wednesday, November 16, 2011


STA630 GDB


Discussion Question
Both, the Moderating and Extraneous variables have an influence on the relationship between the dependent and independent variable. Discuss the basis on which we can differentiate moderating and extraneous variables?

Instructions:

Read the following instructions before giving your comments on GDB:
  1. Use the font style “Times New Roman” and font size “12”.
  2. Your answer should be relevant to the topic i.e. clear and concise.
  3. Do not copy or exchange your answer with other students.  Two identical / copied comments will be marked Zero (0) and may damage your grade in the course.
  4. Books, websites and other reading material may be consulted before posting your comments but copying or reproducing the text from books, websites and other reading materials is strictly prohibited. Such comments will be marked as Zero (0).
  5. Obnoxious or ignoble answer should be strictly avoided.





















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SOLUTION 



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 anexperiment.


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