Education Technology

Will Girls and Boys Be Equal?

Published on 06/09/2008

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