Homework Answers
a. Option 1
Trend pattern
b.
| x | Y |
| 1 | 5 |
| 2 | 12 |
| 3 | 10 |
| 4 | 13 |
| 5 | 16 |
| Intercept | INTERCEPT(known Y's,known X's) | 4.30 |
| Slope | SLOPE(known Y's,known X's) | 2.30 |
| x | Y | linear trend Forecast, Y= Intercept + slope*x | Absolute deviation= |Forecast - Actual| | squared deviation= (absolute deviation)^2 |
| 1 | 5 | 6.6 | 1.60 | 2.6 |
| 2 | 12 | 8.9 | 3.10 | 9.6 |
| 3 | 10 | 11.2 | 1.20 | 1.4 |
| 4 | 13 | 13.5 | 0.50 | 0.3 |
| 5 | 16 | 15.8 | 0.20 | 0.0 |
| 6 | 18.1 | |||
| 2.78 | ||||
| MSE |
Intercept= 4.30
Slope= 2.30
MSE= 2.78
c. Forecast for x=6
Y= 4.3+ 2.3*x = 18.1
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