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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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