Education Technology

Statistics: Percentiles - IB

by Texas Instruments

Updated on January 18, 2023


  • Students will learn review the concepts of a normal distribution and its characteristics, including but not limited to percentiles and area under a normal curve.
  • Students will practice how to use the handheld commands Normal Cdf and Inverse Normal.
  • Students will try to make a connection with how to understand these topics in IB Mathematics courses and on their final assessments.


  • Percentile
  • Normal Distribution
  • Empirical Rule
  • Probability
  • Standard DeviationMean

About the Lesson

The goal of this activity is for students to use the area to the left of a value in a normal distribution to find its percentile. The process will then be reversed to find the value for a given percentile. In doing so, students will learn how to use the Normal CDF and Inverse Normal commands on the handheld.