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.
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.igure 3. Box-and-whisker plot with four close and one far away extreme values, defined as outliers above Q3 + 1.5(IQR) and Q3 + 3(IQR), respectively. The interquartile range is often used to find outliers in data.