Hannibal Hamlin is the leader of the Temple of the Union in the year 2277. An escaped slave from Paradise Falls, he dreams of creating a safe haven for runaway slaves in the Lincoln Memorial.
Like the standard deviation, the interquartile range (IQR) is a descriptive statistic used to summarize the extent of the spread of your data. The IQR is the distance between the 1st quartile (25th percentile) and 3rd quartile (75th percentile). Q3 - Q1 = IQR.
Next section: Variance and Standard Deviation. The semi-interquartile range is a measure of spread or dispersion. It is computed as one half the difference between the 75th percentile [often called (Q3)] and the 25th percentile (Q1).The formula for semi-interquartile range is therefore: (Q3-Q1)/2.ext section: Variance and Standard Deviation. The semi-interquartile range is a measure of spread or dispersion. It is computed as one half the difference between the 75th percentile [often called (Q3)] and the 25th percentile (Q1).