Is there any statistical test/procedure to measure relationships among a vector (x, y, z), as explained variable, and multiple explanatory variables?

I have carried a survey to consumers. A question can be seen as a vector (x, y, z) with x+y+z=1. For example, for a consumer I have: x=0.5, y=0.3, z=0.2. Is there any statistical test/procedure to...

05 May 2017 1,387 16 View