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describe find the seasonal index and trend line and forecast it.

Quarterly billing for water usage is shown below- 

 

Year

Quarter   

1

2

3

4


Winter

64

66

68

73


Spring

103

103

104

120


Summer

152

160

162

176


Fall

73

72

78

88


1) Find the seasonal index for each quarter.

2) Depersonalize the data.

3) Find the trend line.

4) Presume there is no cyclical component (don't forget- there IS a seasonal component). Forecast the summer billing for year 5.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M923430

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