Quantitative Measures of Spread
Lesson
In the first two practice lessons, you applied your understanding of measures of center and spread to analyze different distributions and to compare groups. In this lesson, you will use the interquartile range and standard deviation to quantify the spread of different distributions. In this lesson, you will: Quantify the spread of distributions using the interquartile range(IQR) and standard deviation (SD) Describe the effect of outliers on IQR and SD Choose the appropriate measure of spread for a distribution