Education Technology

# Activities

• ##### Subject Area

• Math: Statistics: Displaying and Describing Univariate Data

9-12

45 Minutes

• ##### Device
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™ Navigator™
• TI-Nspire™
• TI-Nspire™ CAS
• ##### Software

TI-Nspire™
TI-Nspire™ CAS

3.0

## SD: Measure of Spread

#### Activity Overview

This lesson is intended as an introductory activity to the concept of standard deviation.

#### Objectives

• Students will identify the standard deviation as a measure of spread about the mean of a distribution.
• Students will recognize that the size of the standard deviation depends on the spread of the distribution.

#### Vocabulary

• deviation
• dot plot
• mean
• range
• standard deviation

#### About the Lesson

This lesson is intended as an introductory activity to the concept of standard deviation.
As a result, students will:

• Manipulate a dot plot to obtain specified standard deviations.
• Examine different distributions with the same mean and range and note how the standard deviation changes.
• Gain a basic understanding of what standard deviation is measuring and how changes in data values affect the standard deviation.