
UAS STATISTIKA EKONOMI (96,5 menit)
Authored by Dina Apryani
Mathematics
University
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27 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Tabel berikut menunjukkan distribusi probabilitas variabel acak diskrit X:
Hitunglah nilai ekspektasi (harapan) E(X).
2,4
2,5
2,6
2,7
3,0
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Manakah dari berikut ini yang merupakan variabel acak diskrit?
Suhu udara
Waktu tiba bus
Jumlah panggilan telepon per hari
Berat badan penumpang
Panjang kabel
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Probabilitas sukses dalam suatu percobaan adalah 0.6. Jika percobaan dilakukan sebanyak 4 kali, berapa peluang memperoleh tepat 2 kali sukses?
0,2304
0,3456
0,4032
0,4608
0,5000
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Dari 6 mahasiswa laki-laki dan 4 mahasiswa perempuan, akan dipilih 3 orang secara acak tanpa pengembalian untuk presentasi.
Berapa peluang terpilih tepat 2 laki-laki dan 1 perempuan?
0,50
0,55
0,60
0,65
0,70
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Dalam rata-rata 2 kendaraan melintasi sebuah jembatan setiap menit.
Berapakah peluang bahwa tidak ada kendaraan yang lewat dalam satu menit?
0,018
0,067
0,135
0,202
0,368
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Berat badan mahasiswa berdistribusi normal dengan rata-rata 60 kg dan simpangan baku 5 kg.
Berapakah peluang bahwa seorang mahasiswa memiliki berat kurang dari 65 kg?
0,3413
0,4332
0,5000
0,8413
0,9332
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Manakah pernyataan berikut yang benar tentang kurva distribusi normal?
Selalu miring ke kanan
Modus < Median < Rata-rata
Berbentuk U
Simetris terhadap rata-rata
Nilai Z selalu negatif
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