Step 1
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.
Mathematics lessons for IB® Diploma Programme
Applications and Interpretation | Probability and Statistics
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
Step 2
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.
Step 3
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.