MAT 540 MAT540 Week 4 Homework
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MonthDemand for Soft Shag Carpet (1,000 yd.)3 mos moving average forecastWeighted 3 mos moving average forecastError abs()Error abs()
110
29
38
49
510
612
714
811
9
Please apply weights stated in the problemWeights: 0.55 (most recent month), 0.35, 0.10
Compute MAD on 3 mos moving average Note: average over month 4 through 8 only. No data available to month 9
Compute MAD on weighted 3 mos moving average Note: average over month 4 through 8 only. No data available to month 9
Which is a better forecast method?
Petroco Service Station
alpha =0,4
MonthGas DemandExp ForecastError
October775----
November835
December605
January450
February600
March700
April820
May925
June1500
July1200
August
8410 SUM
MAPD
Science and Technology Mutual Fund
alpha =0,3
MonthFund Price3 mos moving average forecastWeighted 3 mos moving average forecastExp Forecast3 mos MA errorWeighted 3 mos MA error Exp. Smoothing error
155 3/4------------
254 1/4--------
355 1/8--------
458 1/8
553 3/8
651 1/8
756 1/4
859 5/8
962 1/4
1059 1/4
1162 3/8
1258
1358 1/8
1462 3/4
1564 3/4
1666 1/8
1768 3/4
1860 1/2
1965 7/8
2072 1/4
21
Please apply weights stated in the problemWeight 0.5 (most recent), 0.3, 0.2
Compute MAD on 3 mos moving average
Compute MAD on weighted 3 mos moving average
Compute MAD on exponentially smoothed forecast
Which is a better forecast method?
Carpet City Regression
X - axisY - axis
Monthly Construction PermitsMonthly Carpet Sales (1,000 yd.)
179
2514
810
712
1415
79
4524
1921
2820
2829
Place regression output here
Y = A + Bx
A =
B =
Forecast Carpet sales for 30 construction permits
Correlation Coefficient
Gilley's Ice Cream Parlor
xy
Ave. TempIce cream Sold
Week(degrees)(gal.)
16880
270115
37391
47987
577110
682128
785164
890178
985144
1092179
1190144
1295197
1380144
1475123
Place regression output here
(a) Y = A + Bx
A =
B =
(b)Correlation Coefficient
(c')Coefficient of Determination
Explain the meaning of the coefficient of Determination below. What does it indicate?
[Solved] MAT 540 MAT540 Week 4 Homework
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- Submitted On 13 May, 2016 07:38:52
- Halsey
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MAT 540 MIDTERM EXAM
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