NormalCDF equation (1 Viewer)

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Anyone who has a TI-83 or 84 calculator will probably know about the normalcdf(minimum, maximum, mean, std. deviation) command. It is used to find the area under a normal curve between two given points.

My question is; does anyone know the equation that the calculator uses to find this result? I looked in my Probability and Statistics text book, but could only find the equation for normalpdf:
[tex]y=\frac{1}{\sigma \sqrt{2\pi}}e^{-\frac{1}{2}(\frac{x-\mu}{\sigma})^2}[/tex]​
If anyone could help me find the equation for normalcdf, I would greatly appreciate it.

Thank you in advance.
 

The Physics Forums Way

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top