Education Technology

# Activities

• ##### Subject Area

• Math: Middle Grades Math: Statistics and Probability
• Math: PreAlgebra: Probability, Statistics and Data Analysis

6-8

60 Minutes

• ##### Device
• TI-30X IIB
• TI-30X IIS
• TI-34 II Explorer Plus™
• ##### Other Materials
This is Activity 12 from the EXPLORATIONS Book:
Math Investigations with the TI-30X IIS and TI-34 II: Activities for the Middle Grades

You will need the following materials for this activity:
• Rulers

## Will Girls and Boys Be Equal?

#### Activity Overview

Students explore concepts in probability and statistics. In this activity, they model a situation to find experimental probability and construct a box-and-whisker plot. They compare the experimental and theoretical probabilities for the situation.

#### Before the Activity

• See the attached PDF file for detailed instructions for this activity
• Print pages 117 - 122 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to the class.

Follow the activity procedures:

• Estimate the probability of exactly 25 out of 50 babies being girls
• Use the RANDI function on the calculator to generate 1's and 2's randomly to represent girls and boys, and record the number of times the calculator "threw up" a girl in fifty trials
• Find the experimental probability of exactly 25 out of 50 babies being girls
• Use Pascal's triangle to determine the theoretical probability for exactly 25 boys and 25 girls
• Construct a box-and-whisker plot for the data
• Mark the minimum value, the first quartile, the median, the third quartile, and the maximum value on the plot
• #### After the Activity

Students complete the Student Activity pages.

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