Education Technology

# Activities

• ##### Subject Area

• Math: Statistics: Inferential Statistics

9-12

60 Minutes

• ##### Device
• TI-83
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition

TI Connect™

• ##### Accessories

TI Connectivity Cable

• ##### Other Materials
This is Activity 4 from the EXPLORATIONS Book:
Statistics Handbook for the TI-83

## Describing Categorical Data

#### Activity Overview

Students analyze the distribution of categorical data. They calculate percents and visually compare the data sets with a bar chart.

#### Before the Activity

• See the attached PDF file for detailed instructions for this activity
• Print pages 37 - 43 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to the class.

• Enter the population versus race data as lists
• Express the data in percent form
• Plot the percent data as a bar graph [histogram]
• Compare the population distribution

• Enter a more detailed population, age group, and race data as lists
• Save the data in a matrix
• Calculate the column percents
• Draw comparative bar charts
• Examine the age-wise population distribution for each race
• Calculate the percent of each cell using the total population number
• Calculate the row percents and store the results in a matrix
• Draw bar charts to show the population distribution for each age group
• #### After the Activity

Review student results:

• As a class, discuss questions that appeared to be more challenging
• Re-teach concepts as necessary