c. Diagram Garis d. Diagram histogram
NILAI | FREKUENSI | F. KOMULATIF |
41 - 50 | 5 | 5 |
51 - 60 | 6 | 11 |
61 - 70 | 9 | 20 |
71 - 80 | 4 | 24 |
81 - 90 | 5 | 29 |
91 - 100 | 1 | 30 |
* Ukuran tendesi sentral *
* Data Tunggal
Contoh :
1. 3 , 4 , 6 , 4 , 5
Rata2 : Ẍ = {(3 + 4 + 6 + 4 + 5)/5}
* Data Tunggal Berbobot
Contoh :
NILAI | FREKUENSI | Fx |
3 | 2 | 6 |
4 | 3 | 12 |
5 | 7 | 35 |
6 | 0 | 0 |
7 | 8 | 21 |
8 | 3 | 24 |
ƩF = 3 | ƩFx = 98 |
* Rata -rata = Ẍ = ƩFx/ƩF
NILAI | F | TITIK TENGAH (X) | Fx |
41 – 50 | 5 | 45.5 | 227.5 |
51 – 60 | 6 | 55.5 | 333 |
61 – 70 | 9 | 65.5 | 589.5 |
71 – 80 | 4 | 75.5 | 302 |
81 – 90 | 5 | 85.5 | 427.5 |
91 – 100 | 1 | 95.5 | 95.5 |
ƩF = 30 | ƩFx = 1975 |
>> Menentukan rata2 dengan menggunakan rata2 sementara
NILAI | F | X | d | Fd |
41 – 50 | 5 | 45.5 | -10 | -50 |
51 – 60 | 6 | 55.5 | 0 | 0 |
61 – 70 | 9 | 65.5 | 10 | 90 |
71 – 80 | 4 | 75.5 | 20 | 80 |
81 – 90 | 5 | 85.5 | 30 | 150 |
91 – 100 | 1 | 95.5 | 40 | 40 |
ƩF = 30 | ƩFd = 310 |
>> Misal, rata2 sementara : 55.5
d = Simpanan
= ( x - rata2 sementara)
maka, rata2 sesungguhnya = rata2 sementara + ƩFd/ƩF
11 Juli 2016 pukul 01.52
thx utk ilmunya gan