Education Technology

# Activities

• ##### Subject Area

• Math: Statistics: Normal Distributions

9-12

30 Minutes

• ##### Device
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™ Navigator™
• TI-Nspire™
• TI-Nspire™ CAS
• ##### Software

TI-Nspire™
TI-Nspire™ CAS

3.0

## Percentiles

#### Activity Overview

Students use the area to the left of a value in a normal distribution to find its percentile and then reverse the process to find the value for a given percentile.

#### Key Steps

• In Problem 1, students find the mean, standard deviation, and normal distribution in order to find the percentile of a given score. They will also use the Normal Cdf command.

• Problem 2 asks students to find the score given the percentile. Students reverse the method used in problem 1. This reversal is done by using a command called Inverse Normal.

• In problem 3, students find the solutions to each scenario given. These scenarios include finding the higher percentile given two scores from different distributions, estimating a score, and finding a possible score.