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Date Posted: 7/25/2008 1:05:45 AM  Status: Live
probobilty
Course Textbook Chapter Problem
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Question Details:
 

Q # 1:                                                                                      MARKS 10

The following table shows the number of bags (hundreds) of fertilizer sold by certain dealer in different years.

Year

        Quarters

 I         II       III       Iv

2005

2006

2007

 

72      98     79     106

79     122   101    143

94     141   128     160

 

 

 

 

 

 

 

 

   (i) Compute “4-quarter moving” averages.

 

   (ii) Compute “4-quarter centred moving” averages                                                 

 

 

 

Answers:

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Date Posted: 7/25/2008 3:17:55 AM  Status: Live
Asker's Rating: Helpful   
Response:

year

number of bags

four year moving average total (not centered)

four year moving average (not centered)

2-item moving average

4-year moving average

2005

72

 

 

 

 

 

98

 

 

 

 

 

 

355

88.75

 

 

 

79

 

 

179.25

89.625

 

 

362

90.5

 

 

 

106

 

 

187

93.5

 

 

386

96.5

 

 

2006

79

 

 

198.5

99.25

 

 

408

102

 

 

 

122

 

 

213.25

106.625

 

 

445

111.25

 

 

 

101

 

 

226.25

113.125

 

 

460

115

 

 

 

143

 

 

234.75

117.375

 

 

479

119.75

 

 

2007

94

 

 

246.25

123.125

 

 

506

126.5

 

 

 

141

 

 

257.25

128.625

 

 

523

130.75

 

 

 

128

 

 

 

 

 

 

 

 

 

 

 

160
mulaan's Comment:
thanx
DONALD



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