# Activities

• • • ##### Subject Area

• Math: Statistics: Probability and Random Variables

• ##### Author 9-12

30 Minutes

• ##### Device
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition
• TI-Navigator™
• ##### Report an Issue

Plotting a Binomial Probability Distribution Curve

#### Activity Overview

This activity introduces students to the graph of a binomial probability distribution and the affect of changing the probability of success on the shape of the graph. Students, with the aid of their TI calculators and TI-Navigator system, each find ten random numbers from a binomial distribution with 12 trials where the probability of success is 0.2. They send their results to the teacher's computer where they are plotted in a histogram.

#### Before the Activity

The teacher should make copies of the student worksheet for each student. The teacher should determine whether the students need any additional instruction or background information aside from what is provided on the worksheet. Each student will need a TI-83 Plus (operating system 1.19 or higher) or TI-84 Plus (operating system 2.40 or higher) loaded with the applications LearnChk, NavNet, θAlgACT, and θnavstk. The teacher needs a TI-Navigator system with 3.0 software and a data projector.

#### During the Activity

After students complete the discussion questions in small groups, there should be a short class discussion to bring the class together.

#### After the Activity

Once the activity is over, the class should review and discuss the implications of their findings.