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Documentos de la EPN probabilidad
Typology: Exams
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a) (1.0 p)
]Li - Li+1] m(i) f(i) fr(i) F(i) Fr(i)
!
(#$%)
!"
#$$
'( ( &'#
)
) ( &
)
+,
)$
( *$
)
#$$
$-.
*-
𝑀𝑜 = 750 𝑑ó𝑙𝑎𝑟𝑒𝑠
El valor referencial es 900 dólares , el valor más representativos es la Mediana.
%
*+
)$(+*)
#$$
$+
*/
0+
)$()*)
#$$
$-.
*-
d) (1.0 p) 𝑠 = 350. 793 𝑑ó𝑙𝑎𝑟𝑒𝑠 ; 𝐴𝑠 = 1. 032 Asímetrico positivo o hacia la derecha
e) (1.0 p)
,
,
%
%
1
1
1
L: “Se utiliza una letra en la clave”
N: Se utiliza un número en la clave”
a) (0.5 p) 𝑛𝐶𝑟
!
(#$!%&)!
!!(#%&)!
)
&*!
)!∗&,!
b) (0.5 p)
= 1600 claves
c) (0.5 p)
= 1080 claves
d) (0.5 p)
= 40 claves
e) (0.5 p)
= 60 claves
J: “Cliente joven” ; A: “Cliente adulto” ; V: “Cliente anciano”
M: “Cliente Movistar” ; C: “Cliente Claro” ; T: “Cliente Tuenti”
a) ( 0. 5 p) 𝑃
| .∩ 0
|
| 1
|
)
322
b) ( 0. 5 p) 𝑃(𝑀
4
| 5
|
| 1 |
322
,
322
c) ( 0. 75 p) 𝑃C𝐶 ∩ (𝐽 ∪ 𝐴)E = 𝑃C(𝐶 ∩ 𝐽) ∪ (𝐶 ∩ 𝐴)E = 𝑃(𝐶 ∩ 𝐽) + 𝑃(𝐶 ∩ 𝐴) =
| 4 ∩.|
| 1 |
| 4 ∩ 8 |
| 1 |
&
322
322
&*
322
d) ( 0. 75 p) 𝑃(𝑇
4
4
4
| 0
|
| 1
|
| 9
|
| 1
|
| 0 ∩ 9
|
| 1
|
&
322
&
322
,
322
,:
322