Here is an interesting analysis designed for those who claim that CO2 does not correlate to temperature. (Sound familiar?). It is by a recently familiar name from the comments, Joseph.
I am not statistically well endowed, but Robert Grumbine comes to the same conclusion that when you accept the noisy nature of the data (aka reality) the fact is that CO2 does correlate to the modern temperature record very well, as expected.
How does Joseph’s analysis look? He has some big numbers in terms of confidence.