H1: Advertisement (IV) has positive impact on Sale (DV)
Above is hypothesis of my study. Results (values) of my data are:
Coefficient: -0.56, t value -0.129, p value 0.864
P value is showing insignificant relationship but coefficient and t values are showing the reverse (negative) impact of IV on DV.
My query is that should I ignore reverse sign or I have to provide justification of negative sign?
The simplest answer is: Advertisement (IV) has no impact on Sale (DV). There is no need to interpret the negative coefficient because p > .05.
If P value shows insignificant relationship , it is unremarkable and no need to interpret it.
Hello, Basically, if your variables are positively correlated, then the coefficients will be negatively correlated, which can lead to a wrong sign on one of the coefficients.
One check would be to perform a principal components regression or ridge regression. This reduces the dimensionality of the regression space, handling the multicollinearity. You end up with biased estimates but a possibly corrected signs. Whether you go with those particular results or not, it's a good diagnostic check. If you still get sign changes, it may be theoretically interesting.
Karen A. Darbinyan thank you, I will again check correlation and multicollinearity .
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