Education Technology

# Activities

• ##### Subject Area

• Math: Statistics: Inferential Statistics

9-12

60 Minutes

• ##### Device
• TI-89 / TI-89 Titanium

TI Connect™

• ##### Accessories

TI Connectivity Cable

• ##### Other Materials
This is Activity 6 from the EXPLORATIONS Book:
Advanced Placement Statistics with the TI-89

## Randomization in Sampling and Experiments

#### Activity Overview

This activity covers random sampling and randomization for experiments.

#### Before the Activity

Install the Statistics with List Editor application on the calculator using one of these two methods:

• TI Connect™, a TI Connectivity Cable, and the Unit-to-Unit Link Cable
• TI-Navigator™ "send to class" feature
• See the attached PDF file for detailed instructions for this activity
• Print pages 87 - 92 from the attached PDF file for your class

#### During the Activity

Distribute the pages to the class.

Follow the Activity procedures:

• Enter the students' names, gender, and identification numbers (ID) in a list or a matrix
• Use the calculator to generate a simple random sample of five students without repeats
• Sort the list of ID and gender in ascending order
• Select a random sample of five students from the class in proportion to the number of males and females in the class
• Divide 24 students randomly into two equal groups, with and without replacements
• Generate a sample of 12 numbers out of 24 numbers without replacement
• Use non-consecutive integers to generate random samples
• #### After the Activity

Review student results:

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