Query regarding Multi group analysis

[Maneesha Singh]

Respected sir and group members,

I am conducting a research that has three IVs and one DV. I used smart-pls 4 for structural equation modeling. Further, I wish to check the moderating effect of a categorical variable (investment experience) with 4 categories. After going through few YouTube videos on MGA, I understood that 'omnibus test of Group' is the appropriate way of dealing with this and smart-pls does not allow that at present. 

It will be very helpful if I could find an alternative approach to deal with this. 

Thanking you

Maneesha Singh

Research scholar

Motilal Nehru National Institute of technology 

[Anant Malik]

"Omnibus test of group" is not some test in itself Ms. Maneesha. Omnibus tests are a class of tests. The word omnibus means someone who can do everything. :)

Therefore, omnibus tests are a class of tests which test all the possible combinations of variables. :)

An omnibus test (also called a combined test) is an overall test for a whole group of results.

For example, the ANOVA is an omnibus test. The t-Test is a special case of the ANOVA. But, the t-Test is a limited test. The t-Test can test the difference in two groups. If you have three variables, then, in order to compare all of them, you would have to perform t-Test three times.

But, as soon as the number of variables becomes four, the total number of t-Tests required would become 3 + 2 + 1 = 6 t-Tests and you would start becoming psychologically unstable. :)

Therefore, the elder brother of the t-Test, the ANOVA takes the matters in his own hands. The ANOVA, run once, would test all six, run once. :)

Therefore, people like ANOVA are called to be having an omnibus personality. :)

Fun explanation. :)

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[Neeraj Kaushik]

Prof Ringle's take on OTG:

https://forum.smartpls.com/viewtopic.php?t=16122

Worth reading!

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