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Citizen SR-270N Manual

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-P13-
Probabilidade
• Esta calculadora provê as seguintes funções de probabilidade:
(Veja Exemplo 33~36.)
[ nPr ] Calcula o número de permutações possíveis de
n items tomando r a cada vez.
[ nCr ] Calcula o número de combinações possíveis de
n items tomando r a cada vez.
[ x! ] Calcula o fatorial de um x inteiro positivo especi
fi cado onde x
≦
69.
[ RANDOM ]
Gera um número randomico entre 0.000 e 0.999
Outras funções ( x
–1
, , , , x
2
, x
3,
x
y
)
• A calculadora também provê funções de recíproca ( [ x
–1
] ),
raiz quadrada ( [ ] ), raiz cúbica ( [ ] ), raiz universal [ ],
quadrado ( [ x
2
] ), cúbico ( [ x
3
] ) e exponenciação ( [ x
y
] ).
Veja Exemplo 37~40.
Cálculo de Derivação Standard
Use o modo SD para cálculos de derivação standards.
• Sempre se assegure de apagar a memória estatística através de
[ 2nd ] [ Scl ] antes de executar cálculo de derivação standard.
• Dados individuais podem ser entrados usando [ DT ] ; Para dele-
tar dados que você acabou de entrar, por favor pressione [ 2nd ]
[ CL ]. Dados múltiplos do mesmo valor podem ser entrados
usando [ 2nd ] [
；
]. Por exemplo, para entrar o dado 15 sete
vezes, pressione 15 [ 2nd ] [
；
] 7 [ DT ].
• Os valores das variáveis estatísticas dependem dos dados que
você entrou. Você pode revocar los através das operações funda-
mentais mostradas na tabela abaixo. Veja Exemplo 41.
[ RCL ] + [ A ]
x
_
[ 2nd ] + [ x
_
]
[ RCL ] + [ B
]
X
σ
n
[ 2nd ] + [
X
σ
n
]
n
[ RCL ] + [ C
]
X
σ
n-1
[ 2nd ] + [
X
σ
n-1
]
Cálculo de regressão
Use o modo de REG para cálculos de regressão.
Pressione [ MODE ] 3 para entrar no menu REG e depois escolha
um dos seis tipos de regressão apertando o valor de argumento
correspondente, como se segue :
… 42 …


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