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HP 9s Operating Instructions

Scientific calculator

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hp 9s
Scientific Calculator
General Operations
Power Supply
On or Off
To turn the calculator on, press [ON/C].
To turn the calculator off, press [2ndF] [OFF].
Auto power-off function
The calculator automatically turns off if it has not been used for
approximately 9 minutes. Power can be restored by pressing the
[ON/C] key again. Memory contents and the current mode setting
(STAT, DEG, CPLX, Base-n,etc) are retained when you turn off the
power and when the calculator automatically turns off.
Battery replacement
The calculator is powered by two alkaline button batteries (GP76A or
LR44). If the display becomes dim and difficult to read, the batteries
should be replaced as soon as possible.
To replace the batteries:
1.
Slide the battery cover off and remove the old batteries.
2.
Insert new batteries, with positive polarity facing outward.
3.
Replace the battery cover and press [ON/C] to turn on the power.
The keyboard
Most of the keys can perform two functions.
–1
sin
2nd function ― ― ― ― ― ―
sin
1st function ― ― ―
1st functions
These are functions that are executed when you press a key without
first pressing [ 2ndF ]. The function performed is indicated by the label
on the key.
2nd functions
These are functions that are executed when you press a key after first
pressing [ 2ndF ]. The function performed is indicated by the label
above the key.
When you press [ 2ndF ], the 2ndF indicator appears in the display to
indicate that you will be selecting the second function of the next key
you press. If you press [ 2ndF ] by mistake, simply press [ 2ndF ]
again to remove the 2ndF indicator.
Note: [ A ], [ B ], [ C ], [ D ], [ E ], [ F ] are 1st functions in HEX mode.
Display Symbols
The following symbols, shown on the display, indicate the status of
the calculator.
DEG or RAD or GRAD: degrees, radians or grads angular unit
M
A value is in memory
CPLX
Complex number mode
E
Overflow or error
STAT
Statistical mode
Minus
2ndF
[2ndF] key pressed
( )
Parentheses calculation
CP
Precision capability
BIN
Binary mode
CPK
Process capability
OCT Octal mode
σ
Deviation
HEX Hexadecimal mode
USL
Setting upper limit
ED
Edit mode
LSL
Setting lower limit
HYP Hyperbolic mode
Display Formats
The calculator can display numbers in four formats: floating point,
fixed point, scientific, and engineering.
Floating point format
The floating point format displays numbers in decimal form, using up
to 10 digits. Any trailing zeros are truncated.
If the result of a calculation is too large to be represented by 10 digits,
the display automatically switches to scientific format. If the result of a
later calculation is small enough to be displayed in less than 10 digits,
the calculator returns to floating point format.
To set the display to floating point display format:
DEG
0.
4.
Press [ 2ndF ] [ FIX ] [ • ]
Fixed point format
The fixed point, scientific, and engineering formats use a fixed
number of decimal places to display numbers. If more than the
specified number of decimal places is keyed, the entry will be rounded
to the correct number of decimal places.
Ex. 1: Fix the display at 2 decimal places, then key in 3.256
DEG
1.
Press [ 2ndF ] [ FIX ] 2
0.00
DEG
2.
Key in 3.256 [
]
3.26
ENTER
If fewer than the set number of decimal places is keyed, the entry will
be padded with trailing zeros.
Ex. 2: Fix the display at 4 decimal places, then key in 4.23
DEG
1.
Press [ 2ndF ] [ FIX ] 4
0.0000
DEG
2.
Key in 4.23 [
]
4.2300
ENTER
Scientific format
05
In scientific format, the number 891500 is shown as 8.915 × 10
,
where 8.915 is the mantissa and 5 is the exponent of 10.
Ex. 3: To display 7132 × 125 in scientific format:
DEG
1.
Key in 7132 [ × ] 125 [
]
891500.
ENTER
DEG
05
8.915
2.
Press [ F ← → E ]
You can convert an entry to scientific notation by pressing [EXP] after
entering the mantissa.
5
Ex. 4: Key the number 4.82296 × 10
DEG
05
1.
Key in 4.82296 [ EXP ] 5
4.82296
Engineering format
Engineering format is similar to scientific format, except that the
mantissa can have up to three digits to the left of the decimal and the
exponent is always a multiple of three. This is useful if you have to
3
convert units that are based on multiples of 10
.
Ex. 5: Convert 15V to 15000mV (V = Volts)
DEG
1.
Key in 15
15.
DEG
– 03
15000.
2.
Press [ ENG ] twice.
Ex. 6: Convert 15V to 0.015KV (V = Volts)
DEG
1.
Key in 15
15.
DEG
03
0.015
2.
Press [ 2ndF ] [ ← ] [ 2ndF ] [ ← ]
Order of Operations
Each calculation is performed in the following order of precedence:
1.
Operations in parentheses.
2.
Functions that require pressing the function key before entering a
value, for example, [ DATA ] in statistics mode, and [ EXP ].
3.
Functions that require values to be entered before pressing the
–1
–1
–1
function key, for example, cos, sin, tan, cos
, sin
, tan
, log, ln,
2
–1
3
x
, x
, √ , π ,
√ , x!, %, RND, ENG,
,
, and the unit
conversion functions.
4.
Fractions.
5.
+/–
y
X
6.
x
,
7.
nPr, nCr
8.
×, ÷
9.
+, –
Corrections
If you have made a mistake when entering a number and you have
not yet pressed an arithmetic operator key, just press [ CE ] to clear
the last entry. You can then input the desired number again.
Alternatively,you can delete digits one at a time by pressing the
backspace key: [ 00 → 0 ].
Ex. 7: Change 12385 to 789
DEG
1.
Key in 12385
789.
2.
Press [ CE ] 789
Ex. 8: Change 12385 to 123
DEG
1.
Key in 12385
123.
2.
Press [ 00 → 0 ] twice.
In a series of calculations, you can correct errors in intermediate
results by pressing [ON/C]. This clears the calculation without clearing
memory.
If you press the wrong arithmetic operation key, just press [ CE ] and
then the correct arithmetic key.
Exchange key
Pressing [ 2ndF ] [ X ← → Y ] changes the currently displayed value to
the previously displayed value.
DEG
123 [ + ] 456 [
]
ENTER
579.00
DEG
123 + 456 = ?
[ 2ndF ] [ X ← → Y ]
456.00
DEG
[ 2ndF ] [ X ← → Y ]
579.00
Accuracy and Capacity
Accuracy: ±1 in the 10th digit.
Capacity: In general, calculations can be displayed as a mantissa of
up to 10 digits, a 10-digit mantissa together with a 2-digit exponent up
±99
to 10
, or as an integer between –9999999999 and 9999999999.
Numbers used as input to a particular function must be within the
allowable range for that function (as set out in the following table):
Functions
Allowable input range
sin x, cos x, tan x
10
< 4.5 × 10
Deg:
x
deg
8
< 2.5 × 10
π rad
Rad:
x
10
< 5 × 10
Grad:
x
grad
Also, for tan x:
≠ 90 (2n +1)
Deg:
x
π
Rad:
x
(2n +1)
2
≠ 100 (2n +1)
Grad:
x
where n is an integer.
x
≦ 1
–1
–1
sin
x, cos
x
100
< 1 × 10
x
–1
tan
x
x
≦ 230.2585092
sinh x, cosh x
100
< 1 × 10
x
tanh x
99
< 5 × 10
x
–1
sinh
x
–1
99
1 ≦ x < 5 × 10
cosh
x
< 1
x
–1
tanh
x
–99
100
≦ x < 1 x 10
log x, ln x
1 × 10
x
100
10
–1 × 10
< x < 100
x
100
e
–1 × 10
< x ≦ 230.2585092
100
0 ≦ x < 1 × 10
x
2
50
< 1 × 10
x
x
–1
100
x
│ x │< 1 × 10
, X ≠ 0
100
3
< 1 × 10
x
x
0 ≦ x ≦ 69, where x is an integer.
X !
R → P
100
2
2
< 1 × 10
x +
y
100
P → R
0 ≦ r < 1 × 10
10
Deg :│θ│< 4.5 × 10
deg
8
Rad :│θ│< 2.5 × 10
π rad
10
Grad :│θ│< 5 × 10
grad
Also, for tan x:
Deg :│θ│≠ 90 (2n+1)
π
Rad :│θ│≠
(2n+1)
2
Grad :│θ│≠ 100 (2n+1)
where n is an integer.
100
│ DD │ , MM, SS.SS < 1 × 10
,
0 ≦ MM, SS.SS
100
< 1 × 10
x
y
100
x > 0 : –1 × 10
< y log x < 100
x
x = 0 : y > 0
x < 0 : y = n, 1/(2n+1)
where n is an integer
1
100
<
log  x  100
but –1 x 10
y
x
1
Y
100
y > 0 : x ≠ 0, –1 x 10
<
log y < 100
x
y = 0 : x > 0
y < 0 : x =2n+1, l/n
where n is an integer other than 0
1
100
<
log  y  100
but –1 x 10
x
a b /c
Input : The integer, numerator, denominator
and fraction symbols must in total be no
more than 10 digits.
Result : Displayed as a fraction when the
integer, numerator and denominator are
10
each less than 1 × 10
.
0 ≦ r ≦ n, n ≦ 9999999999; n , r are integers.
nPr, nCr
50
100
 x  < 1 × 10
, Σ x  < 1 × 10
STAT
2
100
0 ≦│Σ x
│< 1 × 10
; n, r are integer
: n ≠ 0, S : n > 1, σ: n > 0
x
Range = 1 ~ r, 1 ≦ n ≦ r, 80 ≦ r ≦ 20400
→ DEC
0 ≦ X ≦ 9999999999 (for zero or positive)
–9999999999 ≦ X ≦ –1 (for negative)
0 ≦ X ≦ 0111111111 (for zero or
→ BIN
positive)
1000000000 ≦ X ≦ 1111111111
(for negative)
→ OCT
0 ≦ X ≦ 3777777777 (for zero or positive)
4000000000 ≦ X ≦ 7777777777
(for negative)
→ HEX
0 ≦ X ≦ 2540BE3FF (for zero or positive)
FDABF41C01 ≦ X ≦ FFFFFFFFFF (for
negative)
Overflow and Error Conditions
The symbol E appears when any of the following conditions occur.
Press [ ON/C ] to remove the overflow or error indicator.
When you attempt to perform a function calculation with a number
outside the allowable input range.
When you attempt to divide a number by 0.
When you have pressed the [ ( ] key more than 15 times in a
single expression.
When any result (whether intermediate or final) or the
99
accumulated total in memory is outside ±9.999999999 × 10
When there are more than six pending operations.
If the calculator becomes locked and pressing keys has no effect,
press [ M+ ] and [ ENG ] at the same time. This unlocks the calculator
and returns all settings to their default values.
Basic Calculations
The following examples of basic calculations assume that your
calculator is in decimal base and with floating point display.
Mixed Arithmetic Calculations
DEG
1 + 2 × 3 = ?
1 [ + ] 2 [ × ] 3 [
]
ENTER
7.
DEG
3.5 [ +/– ] [ + ] 8 [ ÷ ] 2
0.5
–3.5 + 8 ÷ 2 = ?
[
]
ENTER
Parentheses Calculations
Operations inside parentheses are always executed first. You can
specify up to 15 levels of parentheses in a single calculation. When
you enter the first parenthesis, the ( ) indicator appears on the display
and remains until each opening parenthesis has a corresponding
closing parenthesis.
( 5 – 2 × 1.5 ) ×
DEG
2.8
[ ( ] 5 [ – ] 2 [ × ] 1.5 [ ) ] [ × ] 3
3 + 0.8 × (– 4 )
[ + ] 0.8 [ × ] 4 [ +/– ] [
]
ENTER
= ?
2 × ( 7 + 6 × ( 5
2 [ × ] [ ( ] 7 [ + ] 6 [ × ] [ ( ] 5
DEG
122.
+ 4 )) = ?
[ + ] 4 [
]
ENTER
Note: It is not necessary to press [ ) ] before [
].
ENTER
Repeating a Calculation
You can repeat the last number entered, or the last operation
executed, by pressing [
].
ENTER
Repeating the last number
DEG
3 [ × ] [
]
ENTER
9.
3 × 3 = ?
3 × 3 × 3 = ?
DEG
[
]
ENTER
27.
3 × 3 × 3 × 3 = ?
DEG
[
]
ENTER
81.
Repeating the last arithmetic operation
DEG
321 + 357 = ?
321 [ + ] 357 [
]
ENTER
678.
654 + 357 = ?
DEG
654 [
]
ENTER
1011.
DEG
579 – 159 = ?
579 [ – ] 159 [
]
ENTER
420.
DEG
456 – 159 = ?
456 [
]
ENTER
297.
DEG
3 [ × ] 6 [ × ] 45 [
]
ENTER
810.
18 × 45 = ?
18 × 23 = ?
DEG
23 [
]
ENTER
414.
2
18 × (0.5x10
) = ? 0.5 [ EXP ] 2 [
DEG
]
ENTER
900.
DEG
96 [ ÷ ] 8 [
]
96 ÷ 8 = ?
ENTER
12.
75 ÷ 8 = ?
DEG
75 [
]
ENTER
9.375
2
DEG
(1.2x10
) ÷ 8 = ?
1.2 [ EXP ] 2 [
]
ENTER
15.
Percentage Calculations
120 [ × ] 30 [ 2ndF ] [ % ]
DEG
30% of 120 = ?
36.
[
]
ENTER
70% of 120 = ?
DEG
70 [ 2ndF ] [ % ] [
]
ENTER
84.
88 [ ÷ ] 55 [ 2ndF ] [ % ]
88 is 55% of what
DEG
160.
number?
[
]
ENTER
30% mark up of
120 [ + ] 30 [ 2ndF ] [ % ]
DEG
156.
120 = ?
[
]
ENTER
30% discount of
120 [ – ] 30 [ 2ndF ] [ % ]
DEG
84.
120 = ?
[
]
ENTER
Memory Calculations
The M indicator appears when a number is stored in memory.
Recalling from memory does not delete the contents of memory.
The memory is not available when you are in statistics mode.
To copy the displayed number to memory, press [ X → M ].
To clear the memory, press [ 0 ] [ X → M ], or [ CE ] [ X → M ], in
that order.
DEG
[ CE ] [ X → M ]
0.
DEG
3 [ × ] 5 [ M+ ]
M
15.
3 × 5
DEG
56 [ ÷ ] 7 [ M+ ]
+ 56 ÷ 7
M
8.
+ 74 – 8 × 7
DEG
74 [ – ] 8 [ × ] 7 [ M+ ]
M
18.
Total = ?
DEG
[ MR ]
M
41.
DEG
0 [ X → M ]
0.
Common Math Calculations
The following example calculations assume that your display is fixed
at 2 decimal places.
Reciprocal, Factorial
1
–1
DEG
1.25 [ 2ndF ] [ x
] [
]
= ?
ENTER
0.80
. 1
25
DEG
5! = ?
5 [ 2ndF ] [ x! ] [
]
ENTER
120.00
Square, Square Root, Cube Root, Power, Other Roots
2
4
2
y
DEG
2
+ 3
= ?
2 [ x
] [ + ] 3 [ x
] 4 [
]
ENTER
85.00
3
5 [ × ] 27 [ 2ndF ] [
√ ] [ + ]
5 ×
+
= ?
DEG
3
27
34
20.83
34 [ √ ] [
]
ENTER
X
DEG
9
= ?
72 [ 2ndF ] [
√ ] 9 [
]
1.61
72
ENTER
Logarithms and Antilogarithms
DEG
ln7 + log100 = ?
7 [ ln ] [ + ] 100 [ log ] [
]
ENTER
3.95
2
x
DEG
10
= ?
2 [ 2ndF ] [ 10
] [
]
ENTER
100.00
x
5 [ 2ndF ] [ e
] [ – ] 2 [+/–]
5
–2
DEG
e
– e
= ?
148.28
x
[ 2ndF ] [ e
] [
]
ENTER
Fraction calculations
Fractions are displayed as follows:
5
5 」 12
=
12
5
56 ∪ 5 」 12
= 56
12
Note : The display is truncated if the integer, numerator, denominator
and fraction symbols together are more than 10 digits.
Press [ 2ndF ] [ → d /c ] to convert the displayed value to an improper
fraction.
2
3
2 [ a b /c ] 3 [ + ] 7 [ a b /c ] 3
+ 7
DEG
3
5
8 ∪ 4 」 15
[ a b /c ] 5 [
]
ENTER
4
= 8
15
124
DEG
[ 2ndF ] [ → d /c ]
124 」 15
=
15
If you press [ a b /c ] after pressing [
], or if a fraction was
ENTER
combined with a decimal number, the answer is displayed as a
decimal number.
5 [ a b /c ] 4 [ a b /c ] 9 [ + ] 3
4
3
DEG
5
+ 3
9 ∪ 7 」 36
[ a b /c ] 3 [ a b /c ] 4 [
9
4
]
ENTER
7
= 9
= 9.19
DEG
[ a b /c ]
9.19
36
8 [ a b /c ] 4 [ a b /c ] 9 [ + ]
4
DEG
8
+ 3.75 = 12.19
12.19
3.75 [
]
ENTER
9
Where possible, a fraction is reduced to its lowest terms after you
press [ + ], [ – ], [ × ], [ ÷ ] or [
].
ENTER
3 [ a b /c ] 119 [ a b /c ] 21
119
2
DEG
8 ∪ 2 」 3
3
= 8
[
]
ENTER
21
3
A result is displayed in decimal format if the integer, numerator,
denominator and fraction symbols are together more than 10 digits.
12345 [ a b /c ] 5 [ a b /c ] 16
5
6
12345
+5
DEG
[ + ] 5 [ a b /c ] 6 [ a b /c ] 13
12350.77
16
13
[
]
ENTER
= 12350.77
Converting Angular Units
You can specify an angular unit of degrees (DEG), radians (RAD), or
grads (GRAD). You can also convert a value expressed in one
angular unit to its corresponding value in another angular unit.
The relation between the angular units is:
180° = π radians = 200 grads
To change the angular unit setting to another setting, press
[ DRG ] repeatedly until the angular unit you want is indicated in
the display.
After entering the value of an angle, press [ 2ndF ] [ DRG → ]
repeatedly until the value is converted to the desired unit.
DEG
90
90.
90° (deg)
= ? (rad)
RAD
[ 2ndF ] [ DRG → ]
1.57
= ? (grad)
GRAD
[ 2ndF ] [ DRG → ]
100.00
Trigonometric and Inverse Trigonometric Functions
Before undertaking a trigonometric or inverse trigonometric
calculation, make sure that the appropriate angular unit is set.
DEG
3 sin 85° = ?
3 [ × ] 85 [ sin ] [
]
ENTER
2.99
π
[ 2ndF ] [ π ] [ ÷ ] 4 [
]
ENTER
RAD
cos (
rad) = ?
0.71
[ cos ]
4
GRAD
tan 150 grad = ?
150 [ tan ]
–1.00
–1
–1
DEG
sin
0.5 = ? deg
0.5 [ 2ndF ] [ sin
]
30.00
1
–1
2 [ √ ] [ 2ndF ] [ x
] [ 2ndF ]
–1
cos
(
) =
RAD
0.79
2
–1
[ cos
]
? rad
–1
–1
GRAD
tan
1 = ? grad
1 [ 2ndF ] [ tan
]
50.00
Hyperbolic and Inverse hyperbolic functions
cosh1.5+sinh1.5
1.5 [ HYP ] [ cos ] [ + ] 1.5
DEG
4.48
= ?
[ HYP ] [ sin ] [
]
ENTER
–1
–1
DEG
sinh
7 = ?
7 [ HYP ] [ 2ndF ] [ sin
]
2.64
DEG
tanh 1 = ?
1 [ HYP ] [ tan ]
0.76
Rectangular and Polar coordinates
Rectangular Coordinates
Polar Coordinates
a + b i = r (cosθ + i sinθ)
Note: Before undertaking a coordinates conversion calculation, make
sure that the appropriate angular unit is set.
Converting from Rectangular to Polar
DEG
5 [ a ] 6 [ b ] [ 2ndF ] [ R → P ]
If a = 5 and b = 6,
7.81
what are r and θ ? [ b ]
DEG
50.19
Converting from Polar to Rectangular
25 [ a ] 56 [ b ] [ 2ndF ]
If r = 25 and θ =
DEG
13.98
[ P → R ]
56°, what are a
and b ?
DEG
[ b ]
20.73
Permutations and Combinations
! n
! n
nPr =
nCr =
n (
)! r
! r
n (
)! r
How many
permutations of 4
DEG
items can you
7 [ 2ndF ] [ nPr ] 4 [
]
ENTER
840.00
select from a set
of 7 items?
How many
combinations of 4
DEG
items can you
7 [ 2ndF ] [ nCr ] 4 [
]
ENTER
35.00
select from a set
of 7 items?
Sexagesimal ↔ Decimal form Conversions
You can convert a sexagesimal figure (degree, minute and second) to
a decimal number by pressing [
] and convert a decimal number
to a sexagesimal figure by pressing [ 2ndF ] [
].
Sexagesimal figures are displayed as follows:
= 12 degrees, 45 minutes, 30.5
‫׀‬
‫׀ ׀‬
12 45
30
5
seconds
Note: If the total number of digits in a DD, MM and SS.SS figure
exceeds 8, the figure is truncated.
Converting from Sexagesimal to Decimal
12 deg., 45 min.,
12 [
] 45 [
] 30.5
DEG
12.76
30.5 sec.= ?
[
]
Converting from Decimal to Sexagesimal
DEG
‫׀‬
‫׀׀‬
2.12345 = ?
2.12345 [ 2ndF ] [
]
2 7
24
42
Base-n Calculations
Converting between bases
You can add, subtract, multiply, and divide binary, octal, and
hexadecimal numbers in addition to decimal numbers. Select the
number base you want by pressing [ → BIN], [ → OCT], [ → HEX], or
[ → DEC]. The BIN , OCT , and HEX indicators show you which base
you are using. (If none of these indicators is displayed, you are using
decimal base.)
The number keys that are active in a particular base are:
Binary base: [ 0 ] and [ 1 ]
Octal base: [ 0 ] to [ 7 ]
Decimal base: [ 0 ] to [ 9 ]
Hexadecimal base: [ 0 ] to [ 9 ] and [ A ] to [ F ]
DEG
[ 2ndF ] [ → DEC] 31
31.
31 (base 10)
DEG BIN
[ 2ndF ] [ → BIN]
= ? (base 2)
11111.
= ? (base 8)
DEG OCT
[ 2ndF ] [ → OCT]
37.
= ? (base 16)
DEG HEX
[ 2ndF ] [ → HEX]
1F.
[ 2ndF ] [ → HEX] 4 [ × ] 1B
DEG HEX
6C.
4 × 1B (base 16)
[
]
ENTER
= ? (base 2)
DEG BIN
[ 2ndF ] [ → BIN]
1101100.
= ? (base 10)
DEG
[ 2ndF ] [ → DEC]
108.00
= ? (base 8)
DEG OCT
[ 2ndF ] [ → OCT]
154.
Negative Numbers and Complements
In binary, octal, and hexadecimal bases, negative numbers are
expressed as complements. The complement is the result of
subtracting that number from 10000000000 in that number’s base.
You do this by pressing [+/–] in a non-decimal base.
Calculate the
DEG BIN
complement of
[ 2ndF ] [ → BIN ] 11011 [+/–]
binary number
1111100101.
11011
Complex Number Calculations
Press [ CPLX ] to enter complex number mode. The CPLX indicator
appears on the display. You can add, subtract, multiply, and divide
complex numbers.
Complex numbers are generally represented as a + b i , where a is the
real part and bi is the imaginary part.
[ 2ndF ] [ CPLX ] 7 [ a ] 9
DEG CPLX
[ +/– ] [ b ] [ + ] 15 [ a ] 10 [ b ]
22.00
( 7 – 9 i ) +
[
]
ENTER
(15 + 10 i) = ?
DEG CPLX
[ b ]
1.00
Note: Memory calculation is available in complex number mode.
Random Numbers
Press [ 2ndF ] [ RND ] to generate a random number between 0.000
and 0.999.
Unit Conversions
The unit conversion keys are [°F ← → °C ], [ mmHg ← → Kpa ], [ gal ← → I ],
[ lb ← → kg ] and [ oz ← → g ]. The following example illustrates the general
procedure for converting values from one unit to another.
DEG
12 [ A → B ] [ 2ndF ] [ in ← → cm]
12 in = ? cm
30.48
98 [ 2ndF ] [ A ← B ] [ 2ndF ]
DEG
98 cm = ? in
38.58
[ in ← → cm ]
Statistics
Press [ 2ndF ] [ STAT ] to enter statistics mode. The STAT indicator
appears on the display. In statistics mode you can calculate the
following single-variable statistics:
n
number of data items
Σx
sum of the values of all the data items
2
Σx
sum of the squares
mean value
x
2
2
x
(
) x
/n
s
sample standard deviation
n
1
2
2
x
(
) x
/n
σ
population standard deviation
n
Continued on other side

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Summary of Contents for HP 9s

  • Page 1 If the calculator becomes locked and pressing keys has no effect, Corrections press [ M+ ] and [ ENG ] at the same time. This unlocks the calculator If you have made a mistake when entering a number and you have and returns all settings to their default values.
  • Page 2 ENTER 0.57 d'abord sur [ 2ndF ]. La fonction est indiquée par l'étiquette sur la Note: The calculator retains the data you have entered until you exit touche. statistics mode. The data is retained even if you turn off the ème...
  • Page 3 12 et valeur LSL = 2. Imprimé en Chine. STAT En mode STAT [ 2ndF ] [ STAT ] 0.00 Référence HP : F2212-90002 Entrez toutes les [ DATA ] 2 STAT STAT [ DATA ] 5 STAT...