Education Technology

# Activities

• ##### Subject Area

• Math: Statistics: Probability and Random Variables

6-8

30 Minutes

• ##### Device
• TI-73 Explorer™

TI Connect™

• ##### Accessories

TI Connectivity Cable
Unit-to-Unit link cables

## What are the Chances?

#### Activity Overview

In this activity, students determine the probability of a spinner landing on a certain number in eleven trials. They also learn to change the weightage and find subsequent effect on the probability.

#### Before the Activity

• Install the Probability Simulation App application on the calculator using the TI Connect™ , TI Connectivity Cable, and Unit-to-Unit Link Cable

• Set up the calculator as explained in the appendix file
• See the attached PDF file for detailed instructions for this activity
• Print the pages from the attached PDF file for the class
• #### During the Activity

Distribute the pages to the class.

Follow the Activity procedures:

• Select the spin function
• Spin the equally weighted spinner 11 times and record the number of times it lands on the number 3
• Make a table of the outcomes
• Note the probability of getting the pointer on any of the four sections are equally likely
• Change the area thus weightage of section 3 to twice the original area, and spin the spinner as done earlier
• Find the new probability of landing on the number 3 with the weighted spinner
• Use the Probability Simulation app to perform other simulations (draw cards and toss coins) and explore the probability theory
• #### After the Activity

Review student results:

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