How accurate are published papers? I'm an undergrad trying to publish findings on the accuracy of consumer-grade motion sensors for IEEE. I've searched for existing literature on this topic, and I've found some interesting articles. However, I'm not sure how accurate these papers are. 

Once IEEE publishes a paper in a journal or conference, has IEEE deemed the paper's findings as accurate?

That is, has a paper passed science's often-vaunted "peer-review" once that paper has been published?

I realize this question applies for my research and any other research published by a respected organization like IEEE or Nature.
No. The publisher does not and cannot guarantee the correctness of the papers. Also the peer-review system is not perfect.

That being said, even though a single paper might have some chance of being wrong, as studies are replicated, and follow up studies verify and extend the conclusions, the scientific community can build up stronger claims.