HP 20b Business Consultant Financial Calculator User Manual Page 29
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Mathematical Calculations
21
Press O to cancel the Math menu and return to current work. Press :s to return
to the top of the Math menu.
For example, using the math menu calculate Sin
–1
(0.5), see Table 2-5.
In the Math menu, PI does not perform calculations; it enters PI for calculations. You may start
an operation, use the Math menu to execute a function, and continue calculating with your
original operation without losing your work.
The Probability Sub-menu
Lower Tail Normal Distribution (LTND) calculates the probability for a normally distributed,
random variable to be less than the input.
Inverse Lower Tail Normal Distribution (LTND
-1
) is the inverse function for LTND; it calculates
the value (V) for which the probability of a normally distributed, random variable to be less
than V is the given input. Student, Inverse Student, Chi
2
(
2
), Inverse Chi
2
, F-Distribution and
Inverse F-Distribution perform similar operations for Student, Chi
2
, and F-Distributions.
Student, Chi
2
, and F-Distribution and their inverse operations are special cases, as they
require more than one number as input. Student and Chi
2
require (N), the number of degrees
of freedom, and F-Distribution requires (N1) and (N2), two degrees of freedom.
To perform Student and Chi
2
operations or their inverse:
1. Enter the number of degree(s) of freedom by typing the number and pressing I
or =.
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.
To perform F-Distribution operations or their inverse:
Table 2-5 Math Menu Example
Keys Display Description
.5I
:s
Enters 0.5 and opens the Math menu starting
with Trigonometry.
I<
Selects the Trigonometry sub-menu and scrolls to
Sin
-1
. Note the value for Sin
-1
is calculated
immediately and displayed.
I or =
Validates the result.
χ
- HP 20b Business Consultant 1
- HP 30b Business Professional 1
- Legal Notice 2
- Keyboard Map Legend 5
- Table of Contents 7
- Selecting a Language 9
- Two Line Display 10
- until the 11
- <<< 12
- << 12
- Basic Features 13
- Annunciators 14
- The Input Key 14
- The Equals Key 14
- Editing and Clearing Entries 15
- The On/CE Key 15
- The Reset Menu 15
- Notes about Special Menus 16
- Memory and the Memory Menu 16
- Accessing Menus and Menu Maps 16
- or > 17
- returns 17
- with that 17
- Basic Features10 18
- Mathematical Functions 19
- Number Entry and Display 19
- Chain Mode 20
- Algebraic Mode 20
- I or = are valid 21
- I, this 22
- + changes the 22
- <<<< 23
- Mathematical Calculations 25
- Mathematical Calculations18 26
- Random number 27
- The Math Menu 27
- I on any of these items to 28
- The Probability Sub-menu 29
- Binomial Functions 31
- Two-Number Functions 31
- Storing and Recalling Numbers 32
- Recall Arithmetic 32
- returns 0.25 33
- % to add or subtract x % 34
- - returns 150, or 200-25% 34
- 3 Time Value of Money 35
- :x. Press < or > 37
- A. The Amortization 37
- V, M and [ 37
- A followed by < or 38
- I to reset, or O to cancel 40
- :& 41
- O once again 42
- Canadian Mortgage Example 44
- as 1 is the default 45
- Cash Flow Example 46
- P and IRR R 49
- Cash Flows42 50
- Editing Cash Flows 52
- Sample Cash Flow Diagrams 54
- = to calculate it 56
- Bond Calculation Example 57
- O again to exit the menu 58
- :(HOLD)B 59
- The Black-Scholes Menu 60
- (the Black-Sholes key) 60
- = in the 61
- to scroll through the menu 62
- :(HOLD) B 63
- to scroll to the 64
- 8 Date Calculation 65
- 9Break-even 67
- The Percent Calculation Menu 69
- repeatedly to scroll to the 69
- Percent Calculation Examples 70
- to reset the menu, or O to 72
- 11 D e p r e c i a t i o n 73
- The Depreciation Menu 74
- Depreciation Example 75
- 12 Statistical Operations 77
- The Data and Stats Menus 78
- Statistics Example 80
- :z<< 82
- 13 Programming 83
- : and simultaneously 83
- : >or< 84
- Programming Example 85
- Program Step 0 86
- : and the < 87
- Programming80 88
- Figure 2 88
- (HOLD) 89
- Sub-Function Call 90
- and (HOLD) functions 90
- .05003:$1 91
- Messages 92
- (HOLD) . If you want to 93
- Programming86 94
- Table 13-4 94
- Digit Description 94
- Programming88 96
- 14 E rro r M e s s a g e s 97
- Replacing the Batteries 99
- Regulatory Information 100
- Modifications 101
- Canadian Notice 101
- Avis Canadien 101
- Japanese Notice 102
- Korean Notice 102
- Contact Information 103
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