Here is one of the reference-group regression equations from the textbook:
IMMINDEX = 12.13 + 1.95(ONEOUT) + 3.51(BOTHOUT)
with the reference group being respondents who had both parents born inside the U.S.
It seems that having both parents born outside the U.S. makes one more supportive than having just one parent born outside the U.S. What would you have to do in order to definitely claim this?

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The Answer of Here is one of the reference-group regression equations from the textbook:
IMMINDEX = 12.13 + 1.95(ONEOUT) + 3.51(BOTHOUT)
with the reference group being respondents who had both parents born inside the U.S.
It seems that having both parents born outside the U.S. makes one more supportive than having just one parent born outside the U.S. What would you have to do in order to definitely claim this?

Here Is One of the Reference-Group Regression Equations from the Textbook