Two-Number Functions - HP 20B User Manual

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.
Table 2-6 Probability Example
Keys
10I
8I
:s
<<I
<<<<
I =
or
Table 2-7 Inverse Probability Example
Keys
10I
0.37
12I
:s
<<I
<<<<
<
I =
or

Two-Number Functions

+-*/
Apart from
x
Y

Display
Display
, the three additional two-number functions accessible on the keyboard are:
26
Mathematical Calculations
Description
Enters 10 degrees of freedom and the number for which
probability is to be calculated. Opens the Math menu.
Selects the Probability menu item and scrolls to Chi
Validates the result.
Description
Enters 10 degrees of freedom and the probability. Opens
the Math menu.
Selects the Probability menu item. Scrolls to Chi
Validates the result.
2
.
2-1
.