Inverting Normal Cumulative Distribution

## Description

We can use the command `qnorm` to return the inverse of a normal cumulative distribution function evaluated at probability `p`.

## Sage Cell

#### Code

`qnorm(0.95, mean=0, sd=1)`

## Options

#### Calculating from the given probability to the upper tail

The standard `qnorm` function calculates from the lower tail to the given probability `q`. By setting the `lower.tail` parameter to `FALSE`, we can evaluate from the upper tail to the given probability.

#### Code

`qnorm(0.975, mean=0, sd=1, lower.tail=FALSE)`

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Date: 20 Apr 2019 19:25

Submitted by: Zane Corbiere