TUGAS 2 STATISTIKA

BANYAK KELAS INTERVAL 7

77	74	75	71	60	72	75	93	85	53
71	83	68	63	85	76	75	76	65	79
74	78	59	88	76	62	76	60	69	95
71	62	63	78	85	95	77	62	93	90
72	88	78	75	94	74	60	68	81	57
97	61	75	87	73	82	73	73	67	89
82	75	88	75	67	80	62	78	78	65
79	84	86	65	79	96	66	61	73	68

rentang=97-53=44
banyak kelas interval= 1+(3,3)log n
banyak kelas interval= 1+(3,3)log 80
banyak kelas interval= 1+(3,3)1,9
banyak kelas interval= 1+6,27 = 7,27
banyak kelas interval= 7

panjang kelas interval (p)
p= rentang/banyak kelas = 44/7 = 6,3 = 7

p=7, data terkecil 53, yang digunakan 50

(A) Tabel Distribusi Frekuensi

Nilai	Frekuensi (f)	Frekuensi Komulatif (F)
50-56	1	1
57-63	13	14
64-70	10	24
71-77	25	49
78-84	14	63
85-91	10	73
92-98	7	80

(B) Tabel Data Tunggal

xi	fi	xi fi
53	1	53
57	1	57
59	1	59
60	3	180
61	2	122
62	4	248
63	2	126
65	3	195
66	1	66
67	2	134
68	3	204
69	1	69
71	3	213
72	2	144
73	4	292
74	3	222
75	7	525
76	4	304
77	2	154
78	5	390
79	3	237
80	1	80
81	1	81
82	2	164
83	1	83
84	1	84
85	3	255
86	1	86
87	1	87
88	3	264
89	1	89
90	1	90
93	2	186
94	1	94
95	2	190
96	1	96
97	1	97
Jumlah	80	6020

(C)
(1)Data A
MODUS
Mo= b+p (b1/ b1+b2)
Mo= 70,5+7 (15/15+11)
Mo= 70,5+7 (15/26)
Mo= 70,5+3,99
Mo= 74,49

MEDIAN
Me= b+p [(1/2.n-F)/f]
Me= 70,5+7 [(1/2.80-24)/80]
Me= 70,5+7 [(40-24)/80]
Me= 70,5+7 (16/80)
Me= 70,5+4,08
Me= 74,58

MEAN

x	fi	xi	fi/xi
50-56	1	53	0,018
57-63	13	60	0,217
64-70	10	67	0,149
71-77	25	74	0,338
78-84	14	81	0,173
85-91	10	88	0,114
92-98	7	95	0,074
Jumlah	80		1,083

Mean= ∑fi/∑(fi/xi)
Mean= 80/1,083
Mean= 73,86
Mean= 74

(2) Data B
MODUS
Modus= 75

MEDIAN
Median= 75

MEAN

xi	fi	xi fi
53	1	53
57	1	57
59	1	59
60	3	180
61	2	122
62	4	248
63	2	126
65	3	195
66	1	66
67	2	134
68	3	204
69	1	69
71	3	213
72	2	144
73	4	292
74	3	222
75	7	525
76	4	304
77	2	154
78	5	390
79	3	237
80	1	80
81	1	81
82	2	164
83	1	83
84	1	84
85	3	255
86	1	86
87	1	87
88	3	264
89	1	89
90	1	90
93	2	186
94	1	94
95	2	190
96	1	96
97	1	97
Jumlah	80	6020

Mean= ∑fixi/∑fi
Mean= 6020/80
Mean= 75,25