I have performed a linear regression analysis to two series of data, each of which has
50 values. I did the analysis in SPSS and as a result got a table which says that my
adjusted R squared is
0.145 and its significance is
0.004 < 0.05, I assume my
adjusted R squared is significant.
1) Does it mean my
adjusted R squared is credible?
2) What does happen if you get a significance which is
> 0.05? Does it imply the
adjusted R squared can be trusted with credibility but also that the two datasets are not or poorly correlated?
I think I can condense my last question into: does a
statistically non-significant R squared nullify the validity of the calculated