Master Normal Distribution: How to Calculate Probabilities with Z-Tables π
Learn step-by-step methods to find probabilities and areas under the normal curve using cumulative standard normal (Z) tables. Perfect for students and data enthusiasts!

Joshua Emmanuel
2.6M views β’ Jul 2, 2016

About this video
This tutorial shows how to calculate areas/probabilities using the cumulative standard normal tables.
For 0 to Z tables: https://youtu.be/yVCEZr5dF14
For inverse lookup: https://youtu.be/4iUTZs9EAB8
Steps for calculating areas/probabilities using the cumulative normal distribution table:
1. Translate the score (x) into a z-score:
2. Find the corresponding area from the z-table.
3. i) For less than area/probability, the area in the table is the answer.
ii) For greater than area, subtract area in the table from 1.
iii) For area between, subtract smaller area from larger area.
For 0 to Z tables: https://youtu.be/yVCEZr5dF14
For inverse lookup: https://youtu.be/4iUTZs9EAB8
Steps for calculating areas/probabilities using the cumulative normal distribution table:
1. Translate the score (x) into a z-score:
2. Find the corresponding area from the z-table.
3. i) For less than area/probability, the area in the table is the answer.
ii) For greater than area, subtract area in the table from 1.
iii) For area between, subtract smaller area from larger area.
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Video Information
Views
2.6M
Likes
42.0K
Duration
5:21
Published
Jul 2, 2016
User Reviews
4.8
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