This descriptive statistics video tutorial explains how to find the interquartile range and any potential outliers in the data. You need to calculate the first and third quartiles in order to calculate the IQR. Q1 is the median of the lower half of the data and Q3 is the median of the upper half of the data. Statistics - Free Formula Sheet: Final Exam and Test Prep Videos: _________________________________ Introduction to Statistics: Arithmetic, Geometric, & Harmonic Mean: Simple Frequency Tables: Relative Frequency Distribution Table: Cumulative Relative Frequency Table: _________________________________ Dot Plots and Frequency Tables: Stem and Leaf Plots: Side By Side Stem and Leaf Plots: Histograms: How To Make a Frequency Polygon: __________________________________ Quartiles, Deciles, & Percentiles: Interquartile Range & Outliers: Skewness & Symmetric Distribution: Sample Mean and Population Mean: Mean, Median, & Mode - Grouped Data: ____________________________________ Final Exams and Video Playlists: