A regular, normal bowel movement is brown. Some believe the brown color comes from fiber. But, itâs actually a pigment that comes from the breakdown of red blood cells that end up in your poop during the digestive process that gives it its color.But when you have a bowel movement, and your poop is not the expected brown color, it can be alarming.ome believe the brown color comes from fiber. But, itâs actually a pigment that comes from the breakdown of red blood cells that end up in your poop during the digestive process that gives it its color.
Limit comparison test is a test to decide whether the given series is divergent or convergent. Here, we consider two series and we will check how fast this series grow. We consider the limit here. If the limit is zero, then the term below grows faster than the other. So, the series below converges.
(persons with disease/event of interest) to controls (comparison group of persons without disease/event. of interest). Matched case-control studies control for confounding by introducing stratification in the. design phase of a study. Cases are individually matched to a set of controls (1:n ratio); n can vary from 1.