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Forecasting

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posted:
12/1/2011
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Naive

Year Enrollment Error |Error| SD

1 320 N MA ES

2 323 320 3 3 Year 6 343 348 340

3 319 323 -4 4 MAD 13 14 11

4 353 319 34 34 SD 20 18 16

5 343 353 -10 10 Max 34 32 33

6 343 6 13 20



MAD SD



Moving Average (N=2)

Year Enrollment Error |Error| SD

1 320

2 323

3 319 322 -3 3

4 353 321 32 32

5 343 336 7 7

6 348 12 14 18



MAD SD



Exponential Smoothing

Year Enrollment Error |Error| SD

1 320

2 323 320 3 3

3 319 322 -3 3

4 353 320 33 33

5 343 337 6 6

6 340 10 11 16



alpha 0.50 MAD SD



Linear Regression

Year Enrollment Error |Error| SD 360

1 320 316 4 4 355

y = 7.6x + 308.8

2 323 324 -1 1 350 R² = 0.6047

3 319 332 -13 13 345

4 353 339 14 14 340

335

5 343 347 -4 4

330

6 354 0 7 10 325

320

MAD SD 315

310

0 2 4 6 8

LR

354

7

10

14









8



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