σ=40 g
n=245 paq harina de trigo
HYPERLINK UNIMINUTO/202002%20CUARTO%20SEMESTRE/ESTADISTICA%20INFERENCIAL/Ejercicio%20Practico%20Estadisca%20Inferencial.pptx P
[
X ≥ 25 7
]
z=
√
n
(
X−μ
)
σ
z=
√
245
(
25 7−253
)
40
z=15.65247584
(
4
)
40
z=62 .60990337
40 =1.565247584
z=1.57
P
[
Z ≥ z
]
=1−P
[
Z ≤ z
]
P
[
Z ≥ 1.5 7
]
=1−P
[
Z ≤1.5 7
]
P
[
Z ≥ 1.5 7
]
=1−0. 9418
P
[
Z ≥ 1.5 7
]
=0. 0582
P
[
Z ≥ 1.5 7
]
=5.82 %
100 %−5.82%=94 .18 %
RTA: La probabilidad de que la media sea mayor o igual a 257 gramos es del
5.82%.
5.82%
