how many retention times can a chromatogram be compared? how many retention times are the same for different groups how many variables to compare a chromatogram what does the value of ion intensity at retention time what is the median in chromatography mean for each sample at retention time? how many chromatometry retention times is one control sample and one treated sample what is the difference between ion intensity and ion intensity in chromatometry what is the mean ion intensity how many chromatograms can you do each retention times how many samples are in each sample at chromatographic retention time which t test to use for multiple sample retention times how many ion intensity samples at each retention time how many time points are compared at retention time chromatographic retention time mean what is the mean of ion intensity at sample retention time what is the normal ion intensity of a sample at chromatographic retention time what are ion intensity means what is the mean ion intensity at the retention time why would a t test be done for each retention time chromatographic retention time difference