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Estadística segundo parcial
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Apuntes de academia para aprobar el examen de estadística, tanto por parciales como final.
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EJERCICIOS DESCRIPTIVAexperimento consiste seleccionar de macetas cada . Pasados 3 dias
5 semillas medirá el tallo de las
El en una serie
y plantar en una se que hayan germinado
Individuos : las macetas
.
Variable : X : no de semillas germinadas en cada maceta
y
y del tallo
:
longitud .
Variable cuantitativa discreta
Fi
b) Xi ni Mi Si = Mila : Ni/N
O 17 17 171780 17/280 = 0 ,06
L 33 zu 531280 70/280 :0 25
[
,
Q1
2 94 164 44/280 164/780 = 0
, 59
Q[E 79 [43 74) 2006 243/280 =0 87
,
4 33 276 33 /280 276/280 = 0 ,94
280 (200 2801280
S u 4 = 2
II :180
Q1 2 ,5 Fi 25 el 25 de las macetas han máximo 1) Semillas
12 germinado
= =0 en % como .
= .
Q3 = 3 Fi = 0
, 75 en el 75 % de las macetas has germinado como máximo 3 semillas.
Al Q3-Q1 el tercer cuartil de 1 5 semillas
25 La diferencia entre el primer
y
:
:
: es .
m
d 85 % 15 %
sP85 = 3
d) Longitud promedio de los tallos cortados es de 15 68 ,
mm
5x2 dispersión
Osey Hay
622 CV =
EX
= 92 , Sx = 4, 624 =
4 = an 62 , 4 % de entorno a la medi
3 15 68 En el 25 % de las mocestas la
Of = Mínimo : 75 % =
Q3 , ,
lang que como máx de 8mm
25 % =
Q2 100% =
Máximo
Lang . minimo de lostallos fue 3 mm 50 % 11 mm
50% =
Q2 (He) Long Máximo : 37mm 75 % 22mm
. .
,
,
,
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