Perhatikan tabel distribusi frekuensi variabel acak X berikut! x 1 2 3 4 5 6 7 8
Perhatikan tabel distribusi frekuensi variabel acak X berikut!
x | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
P(X = x) | 1/12 | 1/12 | 1/8 | 1/6 | 1/6 | 1/8 | 1/12 | 1/6 |
Tentukan nilai:
a. P(X ≤ 3)
b. P(X ≤ 5)
c. P(4 ≤ X ≤ 7)
Jawab:
a. P(X ≤ 3) = f(1) + f(2) + f(3)
= 1/12 + 1/12 + 1/8
= 2/24 + 2/24 + 3/24
P(X ≤ 3) = 7/24
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