Blood samples following instillation of 2 drops of polymyxin B 10,000 units/ml and trimethoprim 1 mg/ml in the eye resulted in peak plasma concentrations of polymyxin B and trimethoprim of 1 unit/ml and 0.03 mcg/ml, respectively.
An Alternative Definition for IQR. In some texts, the interquartile range is defined differently. It is defined as the difference between the largest and smallest values in the middle 50% of a set of data.To compute an interquartile range using this definition, first remove observations from the lower quartile.Then, remove observations from the upper quartile. Then, from the remaining observations, compute the difference between the largest and smallest values.n Alternative Definition for IQR. In some texts, the interquartile range is defined differently. It is defined as the difference between the largest and smallest values in the middle 50% of a set of data.
Goodshoot/Goodshoot/Getty Images. The interquartile mean is a measure of central tendency. While all values in a data set are used to calculate the mean, only the interquartile range -- the central portion of a data set -- is used to calculate the interquartile mean.Microsoft Excel has an array of built-in functions and formulas.oodshoot/Goodshoot/Getty Images. The interquartile mean is a measure of central tendency. While all values in a data set are used to calculate the mean, only the interquartile range -- the central portion of a data set -- is used to calculate the interquartile mean.