CASTI-89 TITANIUM (STATS/LIST EDITOR APP) · CALC89
invNorm(
Inverse normal distribution: returns the value with a given area to its left. It gives critical values such as 1.96 for 95 percent.
Syntax
invNorm(Area[, μ[, σ]])
- Group
- Distributions
- Arguments
- Takes the area and optional mean μ and standard deviation σ, which default to 0 and 1.
- Availability
- Included
- Menu path
- MATH ▸ Distributions ▸ Inverse ▸ invNorm(
- Origin
- On the TI-89 Titanium this command comes with the preinstalled Stats/List Editor app
Example
| Input | Result |
|---|---|
| invNorm(0.975) | 1.95996398454 |
Typing invNorm(0.975) on the home screen and pressing ENTER returns 1.95996398454.
Keystrokes on the TI-89 Titanium
2NDMATH821
The same key sequence inserts invNorm( in Calc89, and the AI tutor shows it step by step on the on-screen keypad.
Related commands
- invt(Inverse Student t distribution: returns the value with a given area to its left, used for t critical values.
- normCdf(Returns the probability that a normally distributed value lies between two bounds.
- normPdf(Returns the probability density of the normal distribution at a value.
- poissCdf(Returns the cumulative Poisson probability for a range of counts.
- poissPdf(Returns the Poisson probability of exactly a given count.
- tCdf(Returns the Student t distribution probability between two bounds.
- tPdf(Returns the probability density of the Student t distribution at a value.
- binomCdf(Returns a cumulative binomial probability, the chance of a number of successes within a range.