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APRILA WIGUNA 2401150016 TUGAS STATISTIK DATA PERDAGANGAN SAHAM ABM INVESTAMA
1 Januari 2015 s.d. 11 Maret 15
Date Open High Low Close Volume Adj Close*11-Mar-15 2,800.00 2,800.00 2,800.00 2,800.00 0 2,800.0010-Mar-15 2,800.00 2,825.00 2,800.00 2,800.00 53,000 2,800.00
9-Mar-15 2,800.00 2,900.00 2,800.00 2,900.00 75,000 2,900.006-Mar-15 2,800.00 2,900.00 2,800.00 2,900.00 52,000 2,900.005-Mar-15 2,950.00 2,950.00 2,950.00 2,950.00 0 2,950.004-Mar-15 2,950.00 2,950.00 2,950.00 2,950.00 200 2,950.003-Mar-15 3,000.00 3,000.00 3,000.00 3,000.00 0 3,000.002-Mar-15 3,000.00 3,000.00 3,000.00 3,000.00 0 3,000.00
27-Feb-15 3,000.00 3,000.00 3,000.00 3,000.00 550,000 3,000.0026-Feb-15 2,880.00 2,880.00 2,880.00 2,880.00 0 2,880.0025-Feb-15 2,700.00 2,895.00 2,700.00 2,880.00 18,000 2,880.0024-Feb-15 2,895.00 2,895.00 2,895.00 2,895.00 0 2,895.0023-Feb-15 2,850.00 2,895.00 2,800.00 2,895.00 18,600 2,895.0020-Feb-15 2,915.00 2,915.00 2,915.00 2,915.00 0 2,915.0019-Feb-15 2,915.00 2,915.00 2,915.00 2,915.00 0 2,915.0018-Feb-15 2,915.00 2,915.00 2,915.00 2,915.00 0 2,915.0017-Feb-15 2,915.00 2,915.00 2,915.00 2,915.00 0 2,915.0016-Feb-15 2,800.00 2,915.00 2,800.00 2,915.00 2,100 2,915.0013-Feb-15 2,655.00 2,920.00 2,655.00 2,920.00 44,500 2,920.0012-Feb-15 2,925.00 2,925.00 2,925.00 2,925.00 0 2,925.0011-Feb-15 2,925.00 2,925.00 2,925.00 2,925.00 0 2,925.0010-Feb-15 2,925.00 2,925.00 2,925.00 2,925.00 0 2,925.00
9-Feb-15 2,925.00 2,925.00 2,925.00 2,925.00 0 2,925.006-Feb-15 2,925.00 2,925.00 2,925.00 2,925.00 0 2,925.005-Feb-15 2,800.00 2,925.00 2,800.00 2,925.00 151,400 2,925.004-Feb-15 2,925.00 2,925.00 2,925.00 2,925.00 0 2,925.003-Feb-15 2,675.00 2,925.00 2,655.00 2,925.00 192,300 2,925.002-Feb-15 2,900.00 2,900.00 2,900.00 2,900.00 0 2,900.00
30-Jan-15 2,900.00 2,900.00 2,900.00 2,900.00 0 2,900.0029-Jan-15 2,900.00 2,900.00 2,900.00 2,900.00 350,000 2,900.0028-Jan-15 2,890.00 2,890.00 2,890.00 2,890.00 180,900 2,890.0027-Jan-15 2,850.00 2,875.00 2,625.00 2,875.00 310,500 2,875.0026-Jan-15 2,825.00 2,825.00 2,825.00 2,825.00 167,700 2,825.0023-Jan-15 2,760.00 2,760.00 2,760.00 2,760.00 0 2,760.0022-Jan-15 2,760.00 2,760.00 2,760.00 2,760.00 60,200 2,760.0021-Jan-15 2,600.00 2,750.00 2,600.00 2,750.00 46,300 2,750.0020-Jan-15 2,600.00 2,600.00 2,600.00 2,600.00 0 2,600.0019-Jan-15 2,600.00 2,600.00 2,600.00 2,600.00 5,500 2,600.0016-Jan-15 2,650.00 2,650.00 2,650.00 2,650.00 0 2,650.0015-Jan-15 2,650.00 2,650.00 2,500.00 2,650.00 6,600 2,650.0014-Jan-15 2,700.00 2,700.00 2,700.00 2,700.00 0 2,700.0013-Jan-15 2,700.00 2,700.00 2,700.00 2,700.00 0 2,700.0012-Jan-15 2,700.00 2,700.00 2,700.00 2,700.00 0 2,700.00
9-Jan-15 2,700.00 2,700.00 2,700.00 2,700.00 0 2,700.008-Jan-15 2,600.00 2,945.00 2,600.00 2,700.00 15,900 2,700.007-Jan-15 2,425.00 2,700.00 2,425.00 2,700.00 341,700 2,700.006-Jan-15 3,050.00 3,050.00 3,050.00 3,050.00 0 3,050.005-Jan-15 3,050.00 3,050.00 3,050.00 3,050.00 0 3,050.002-Jan-15 3,050.00 3,050.00 3,050.00 3,050.00 0 3,050.001-Jan-15 3,050.00 3,050.00 3,050.00 3,050.00 0 3,050.00
APRILA WIGUNA 2401150016 Data yang akan diolah dan disajikan adalah data dari nilai penutupan (close) Saham ABM Investama, sebagai berikut :
NO Close1 2,600.002 2,600.003 2,650.004 2,650.005 2,700.006 2,700.007 2,700.008 2,700.009 2,700.00
10 2,700.0011 2,750.0012 2,760.0013 2,760.0014 2,800.0015 2,800.0016 2,825.0017 2,875.0018 2,880.0019 2,880.0020 2,890.0021 2,895.0022 2,895.0023 2,900.0024 2,900.0025 2,900.0026 2,900.0027 2,900.0028 2,915.0029 2,915.0030 2,915.0031 2,915.0032 2,915.0033 2,920.0034 2,925.0035 2,925.0036 2,925.0037 2,925.0038 2,925.0039 2,925.0040 2,925.0041 2,925.0042 2,950.0043 2,950.0044 3,000.0045 3,000.0046 3,000.0047 3,050.0048 3,050.0049 3,050.0050 3,050.00
APRILA WIGUNA 2401150016 1. Dot Plot
2550 2600 2650 2700 2750 2800 2850 2900 2950 3000 3050 3100
DotPlot
Close
2. Stem and leaf
Stem and Leaf plot for Close stem unit = 100
leaf unit = 10
Frequency Stem Leaf
4 26 0 0 5 5
9 27 0 0 0 0 0 0 5 6 6
9 28 0 0 2 7 8 8 9 9 9
21 29 0 0 0 0 0 1 1 1 1 1 2 2 2 2 2 2 2 2 2 5 5
7 30 0 0 0 5 5 5 5
50
3. Bloxplot dari dataUkuran Peletakan DataUkuran peletakan data mencakup kuartil, desil dan persentil. Quartil membagi data menjadi 4 bagian, desil membagi data menjadi 10 bagian sedangkan persentil membagi data menjadi 100 bagian. Dalam menghitung ukuran peletakan data, data harus diurutkan terlebih dahulu. Rumus yang digunakan dalam perhitungannya adalah sebagai berikut:1. Rumus kuartil
Qi=datakei4
(n+1 ) , dengan i = 1,2,3
2. Rumus Desil
Di=datakei10
(n+1 ), dengan i = 1,2,3,... 9
3. Rumus Persentil
Pi=datakei100
(n+1 ), dengan i = 1,2,3,... 99
Contoh perhitungan:
P25=Q1=datake14
(50+1 )=data ke12,75=2760
P50=D5=¿Q 2=datake24
(50+1)=datake 25,5=2900¿
P75=Q3=datake34
(50+1 )=data ke38,25=2925
APRILA WIGUNA 2401150016
Berikut adalah gambar boxplotnya:
4. SkewnessSkewness merupakan derajat kemencengan (derajat simetris) dari suatu distribusi. Kemencengan dari suatu distribusi dapat dihitung dengan menggunakan rumus sebagai berikut:
sk=3(x−median)
sPerhitungan skewness dari data saham ABM adalah sebagai berikut:
x=∑i=1
n
x i
n=143205
50=2864,1
s=√∑i=1
n
(x i−x )2
n−1=¿
118,40477
Median=Q2=2900
Sehingga skewness:
sk=3(x−median)
s=3(2864,1−2900)118,40477
=−0,909
Nilai Skewness bernilai negative yang menandakan kemencengan lebih ke arah kanan
5. Histogram
APRILA WIGUNA 2401150016
6. Scatter plot
Scatter plot didapat dari perbandingan nilai open dan close saham perdagangan ABM, yang memperlihatkan hubungan yang linear