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In descriptive statistics, the interquartile range (IQR), also called the midspread or middle fifty, is a measure of statistical dispersion, being equal to the difference between the upper and lower quartiles, IQR = Q 3 â Q 1.nlike total range, the interquartile range has a breakdown point of 50%, and is thus often preferred to the total range. The IQR is used to build box plots, simple graphical representations of a probability distribution.
INR stands for international normalized ratio. The INR provides some information about a personâs bloodâs tendency to clot (which is often described as how âthinâ or âthickâ their blood is). The INR comes from the conversion of another value, the prothrombin time (PT).Prothrombin time is the time it takes for blood to clot in a test tube. A high or low PT can suggest bleeding or clotting tendencies. Most often, the PT is checked to monitor a personâs response to blood thinners such as warfarin (Coumadin). normal INR is approximately 1.0. People taking the blood thinner warfarin typically have a target INR of 2.0 to 3.0. People with an INR higher than the normal range who arenât taking warfarin may have a medical condition that needs further evaluation. A low INR is rarely significant.