HP 20b Consultant Financial, 30b Professional manual 10I, 12I

1.Enter the two degrees of freedom by typing each number followed by Ior

=.

2.Type the number for which you want to calculate the probability, or, for the inverse, the probability for which you want the number.

3.Navigate to the appropriate function in the Probability sub-menu of the Math menu. See Table 2-6. Note: the examples below are calculated with Chain set as the operating mode.

Table 2-6 Probability Example

Keys	Display	Description
10I		Enters 10 degrees of freedom and the number
		for which probability is to be calculated.
8I		Opens the Math menu.
:s

<<I

<<<<

Selects the Probability menu item and scrolls to

Chi2..

Ior =

Validates the result.

Table 2-7 Inverse Probability Example

Keys Display Description

Enters 10 degrees of freedom and the

10I probability. Opens the Math menu.

0.37

12I

:s

<<I

<<<<

<

Selects the Probability menu item. Scrolls to

Chi2-1.

Ior =

Validates the result.

22 Mathematical Calculations