Makalah Statistika Dasar Lengkap
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STATISTIKA DASAR
A. DATA DISKRIT
1. Untuk Data Genap
Data perhitungan banyaknya kemeja yang dimiliki oleh siswa siswi SMKN 1 Daha Selatan, sebagai berikut.
8, 5, 7, 4, 7, 4, 11, 10, 12, 7, 4, 5, 6, 7, 8, 12, 13, 5, 10, 7, 13, 7, 11, 14, 13, 14, 7, 9, 12, 9
v Cara Pengolahan Teknik Data Tunggal
4, 4, 4, 5, 5, 5, 6, 7, 7, 7, 7, 7, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12, 13, 13, 13, 14 14
Banyak Kemeja | Frekuensi (f) |
4 | 3 |
5 | 3 |
6 | 1 |
7 | 7 |
8 | 2 |
9 | 2 |
10 | 2 |
11 | 2 |
12 | 3 |
13 | 3 |
14 | 2 |
Banyak Data (n) | 30 |
a. Persentase (%)
Persentase (%) = x 100%
Banyak Kemeja | Frekuensi (f) | Persentase (%) |
4 | 3 | 10% |
5 | 3 | 10% |
6 | 1 | 3,35% |
7 | 7 | 23,35% |
8 | 2 | 6,66% |
9 | 2 | 6,66% |
10 | 2 | 6,66% |
11 | 2 | 6,66% |
12 | 3 | 10% |
13 | 3 | 10% |
14 | 2 | 6,66% |
Jumlah | 30 | 100% |
b. Mean (Rataan)
c. Median
Data ke 15 (X₁₅) |
Data ke 16 (X₁₆) |
Me =
Me = 8
d. Modus (Nilai yang Sering Muncul)
Mo = 7
e. Kuartil
Ø Kuartil 1 (Q1)
Q1 = X (n+1)
Q1 = X (30+1)
Q1 = X (31)
Q1 = X 7,75
Q1 = 7
Ø Kuartil 2 (Q2)
Q2 = X (2n+2)
Q2 = X (2.30+2)
Q2 = X (62)
Q2 = X 15,5
Q2= 8
Ø Kuartil 3 (Q3)
Q3 = X (3n+2)
Q3 = X (3.30+2)
Q3 |
Q2 |
Q1 |
Q3 = X 23
Q3= 12
f
xᵢ | | ( |
4 | 4,7 | 22,09 |
5 | 3,7 | 13,69 |
6 | 2,7 | 7,29 |
7 | 1,7 | 2,89 |
8 | 0,7 | 0,49 |
9 | -0,3 | 0,09 |
10 | -1,3 | 1,69 |
11 | -2,3 | 5,29 |
12 | -3,3 | 10,89 |
13 | -4,3 | 18,49 |
14 | -5,3 | 28,09 |
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