Submitted by: Submitted by zulfady
Views: 217
Words: 1486
Pages: 6
Category: Business and Industry
Date Submitted: 12/05/2012 05:45 AM
Department of Management
Faculty of Management and Human
Resource Development
SUBJECT:
SHD 1713: STATISTIC 1
LECTURER:
DR, LOW HOCK HENG
PREPARED BY:
NOOR AZNEE BINTI JUNAIDI
820423-12-5184
SX110698HDS04
ZULFADLY BIN SAIFUL
870314-56-5549
SX110718HDS04
MOHD RASYDUDDIN BIN MAT NAWI
830503-03-5829
SX110686HDS04
MOHD HAZRUL AZEWAN
810406-01-5451
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MOHD ASRI BIN MOHD ARIFIN
750203-08-5159
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MOHD FAKERRYIKMAL BIN KAMALUDIN
890417-59-5265
SX112317HDF04
1.
A researcher has collected data on a sample of 2,000 eels in Pacific Ocean. The
researcher measured the length of those eels and develops the following relative
distribution:
Class Length (cm)
25 to less than 30
30 to less than 35
35 to less than 40
40 to less than 45
45 to less than 50
50 to less than 55
55 to less than 60
Relative Frequency, fi
0.22
0.15
0.25
0.24
0.06
0.05
0.03
Develop a frequency distribution from the data above. Calculate the mean as weel.
Answer:
Class Length (cm)
25 to less than 30
30 to less than 35
35 to less than 40
40 to less than 45
45 to less than 50
50 to less than 55
55 to less than 60
Total
Midpoints,
m
27.5
32.5
37.5
42.5
47.5
52.5
57.5
Frequency, f
440
300
500
480
120
100
60
2000
c
∑m f
Mean from a frequency distribution , X =
jj
j=1
n
= 75400
2000
X = 37.7
Relative Frequency,
fi
0.22
0.15
0.25
0.24
0.06
0.05
0.03
1
Percentage
22
15
25
24
6
5
3
100
mf
12100
9750
18750
20400
5700
5250
3450
75400
2.
A randomly collected data of time taken (in minutes) to conduct test on a car engine
are as follows:
141
158
165
172
188
146
159
166
172
189
141
160
166
164
179
142
151
167
175
180
142
150
160
175
180
143
152
160
172
185
143
152
160
174
200
143
154
160
176
234
148
155
160
176
255
143
154
160
174
188
143
155...