How to use BETAINV function in Excel

Summary: This tutorial will guide you on how to use the BETAINV() function in Excel. The BETAINV() function returns the inverse of the beta cumulative probability density function (BETADIST). It's primarily used in data analysis and statistical calculations.

Step 1: Understand the BETAINV function The BETAINV() function has the following syntax:

=BETAINV(probability, alpha, beta, [A], [B])

Here's what each parameter stands for:

• probability: The probability associated with the beta cumulative distribution function.
• alpha: This is the parameter of the distribution, which must be greater than 0.
• beta: This is the second parameter of the distribution, it also must be greater than 0.
• A and B: These are optional parameters that specify the lower and upper bounds of the x. If omitted, A is assumed to be 0 and B is assumed to be 1.

Step 2: Use the BETAINV function Let's say you want to find the inverse of the beta distribution for a probability of 0.4, with alpha and beta parameters of 2 and 3 respectively. You can use the BETAINV() function like this:

=BETAINV(0.4, 2, 3)

This function will return the inverse of the beta cumulative distribution function for the given parameters.

For additional information about the BETAINV() function, here are a few resources:

• BETAINV function
• Beta Distribution and its applications