Statistika 1.docx

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A. DATA Dalam nilai satu kelas D4 yang terdiri dari 30 orang mahasiswa pada mata kuliah MatimatikaBerikut adalah data hasil pengukuran. Tabel 1. Data Hasil Pengukuran Siswa Hasil Praktikum denga NIM I II III 001 90 80 80 002 90 80 80 003 90 80 80 004 90 80 80 005 90 80 80 006 90 80 80 007 90 80 80 008 90 80 80 009 90 80 80 010 90 80 80 011 90 80 75 012 90 80 80 013 90 80 80 014 90 80 70 015 90 80 75 016 90 80 70 017 90 80 80 018 90 80 75 019 90 80 75 020 90 80 70 021 90 80 75 022 90 80 80 023 90 80 75 024 90 80 80 025 90 80 80 026 90 80 75 027 90 80 70 028 90 80 80 029 90 80 75 030 90 80 75 Sumber: dari nilai matematika D4 2016

IV 75 70 75 75 75 70 75 70 70 70 75 70 70 70 75 70 70 70 70 70 70 70 75 70 70 70 70 75 70 75

Kemudian data diurutkan dari yang terkecil ke yang terbesar 70.0 70.0 70.0

75.0 75.0 75.0

80.0 80.0 80.0

90.0 90.0 90.0

70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0

75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0

80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0

90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0

B. TABEL DISTRIBUSI FREKUENSI Langkah-langkah : 1. Menentukan jumlah mahasiswa Jumlah kelas yang diambil adalah 30 2. Menghitung panjang interval kelas 𝑠𝑒𝑏𝑎𝑟𝑎𝑛

Panjang interval kelas = 𝑏𝑎𝑛𝑦𝑎𝑘 𝑖𝑛𝑡𝑒𝑟𝑣𝑎𝑙 𝑘𝑒𝑙𝑎𝑠 Sebaran

= data terbesar – data terkecil = 90.0 – 70.0 = 20.0

Panjang interval kelas = =

𝑠𝑒𝑏𝑎𝑟𝑎𝑛 𝑏𝑎𝑛𝑦𝑎𝑘 𝑖𝑛𝑡𝑒𝑟𝑣𝑎𝑙 𝑘𝑒𝑙𝑎𝑠 20 30

= 0.67 Jadi panjang interval kelas adalah 0.67 dibulatkan menjadi 0.7

3. Menghitung nilai tengah Nilai tengah = =

𝑑𝑎𝑡𝑎 𝑎𝑡𝑎𝑠+𝑑𝑎𝑡𝑎 𝑏𝑎𝑤𝑎ℎ 2 75+80 2

= 77.5 4. Mencari frekuensi dengan cara mengelompokkan data sesuai kelas intervalnya. Frekuensi = mencari jumlah nilai antara 77.4 sampai 77.6 = 3

Diagram Horisontal (Histogram)

Data Nilai Matematika 50 45 40 35 30 25 20 15 10 5 0 90

80 Data Jumlah Mahasiswa

Poligon

75

70

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