Question: Develop a linear regression trendline for the data provided (2008-2015) and provide a regression equation. Use the regression equation from question 1 to obtain forecasted

  1. Develop a linear regression trendline for the data provided (2008-2015) and provide a regression equation.

  1. Use the regression equation from question 1 to obtain forecasted sales (FT) for Jan 2015-Dec 2015 (i.e. months 85-96). Insert your forecasted sales in the Regress Sale Forecast (FT) column in the Table 1 below. Next, calculate the forecast errors for Jan 2015-Dec 2015 (i.e. months 85-96). Insert your forecast error values in the Forecast Error (FET) column in Table below. For your submitted you can simply copy and paste the completed Table 1.

Table 1: 2015 Sales Data and Regression Forecast

Year

Month

Month # (T)

Actual Sales (AT)

Regression Sales Forecast (FT)

Forecast

Error (FET)

2015

Jan

85

12,287

14580.29

0.19

2015

Feb

86

11,519

14669.72

0.27

2015

Mar

87

12,767

14759.15

0.16

2015

Apr

88

13,235

14848.57

0.12

2015

May

89

13,643

14938.00

0.09

2015

Jun

90

13,552

15027.43

0.11

2015

Jul

91

13,349

15116.86

0.13

2015

Aug

92

10,240

15206.29

0.48

2015

Sep

93

14,781

15295.71

0.03

2015

Oct

94

17,123

15385.14

0.10

2015

Nov

95

20,396

15474.57

0.24

2015

Dec

96

23,609

15564.00

0.34

  1. Use the data obtained in Table 1 to calculate the Mean Absolute Percentage Error (MAPE) for 2015 when using the Regression method to forecast sales.

Info in the table may already be right not sure though!

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