Data
hasil tes awal siswa kelas VIII 4. SMP Negeri 2 Kampar
|
No
|
Hasil tes
|
Banyak (f 1)
|
X1
|
f1.x1
|
FI
|
|
1
|
60-64
|
13
|
62
|
806
|
13
|
|
2
|
65-69
|
-
|
67
|
67
|
13
|
|
3
|
70-74
|
6
|
72
|
432
|
19
|
|
4
|
75-79
|
-
|
77
|
77
|
19
|
|
5
|
80-84
|
3
|
82
|
246
|
22
|
|
6
|
85-89
|
-
|
87
|
87
|
22
|
|
7
|
90-94
|
1
|
92
|
92
|
23
|
|
|
|
Jumlah=23
|
|
∑=1807
|
|
1. Carilah
Desil 3, 5, dan 7
2. Carilah
Quartil 1, 2, dan 3
3. Carilah
Presentil 15, 30, dan 45
Jawab:
1. Mencari
Desil
D3=1/10.
n+1 D5=1/10.n+1 D7=1/10.n+1
=3/10.23+1 =5/10.23+1 =7/10.23+1
=0,3.24 =0,5.24 =0,7.24
=7,2 =12 =16,8
2. Mencari
Quartil
K1=1/4.n+1 K2=1/4.n+1 K3=1/4.n+1
=1/4.23+1 =2/4.23+1 =3/4.23+1
=0,25.24 =0,5.24 =0,75.24
=6 =12 =18
3. Mencari
presentil
P15=1/100.n+1 P30=1/100.n+1 P45=1/100.n+1
=15/100.23+1
=30/100.23+1 =45/100.23+1
=0,15.24 =0,3.24 =0,45.24
=3,6 =7,2 =10,8
Mencari
modus
Bbmo=64,5
B1=13
B2=13
P=5
Mo=Bbmo+p
(b1)
b1+b2
=64,5+5 (13)
13+13
=64,5+5 (0,5)
=64,5+2,5
=67
Bb=64,5
Fme=13
fme=13
p=5
me=Bbme+p (n/2-Fme
=64,5+5 (23/2-13)
13
=64,5+5
(12-13)
=64,5+5
(0,07)
=64,5+0,35
=64,85
