I apologize, I could have asked for more context in a more friendly way. Without knowing what you are measuring, how the study was conducted, what comparisons were being made that resulted in a p-value, what the sources of variation are in the study, what is the source of the potential bias, etc. Also, if you could, perhaps, attach a JMP data table or a coded data table if the content is not for public consumption that would be helpful as well.
"All models are wrong, some are useful" G.E.P. Box