**Grade 11 Algebra II Module 4 Lessons 20–21**

How can you use margin of error to estimate a population mean? Join Mrs. Landry as she explores margin of error visually and through a formal definition. You will need a pencil, paper, graphing calculator, and a copy of the Random Segments document. If you have access to a workbook, or a printer, we also suggest using the Classwork for the lesson, which is available using the link below the video.

### Student & Family downloads

Lesson 20 Student Materials

Lesson 20 Homework Helper

Lesson 21 Student Materials

Lesson 21 Homework Helper