2009 Confidence Interval Detail
246/Williamson
246-904/Georgetown ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 955,785,786 | 0.9833 | 972,018,495 | 59 | 6,481 | .003973015 |
| A | 941,164,269 | 0.9867 | 953,850,480 | 55 | 4,625 | .007192876 |
| A | 916,606,907 | 0.9686 | 946,321,399 | 57 | 3,281 | .005198534 |
| A | 901,967,396 | 0.9576 | 941,904,131 | 54 | 2,026 | .010176295 |
| D3 | 207,778,132 | 0.9982 | 208,152,807 | 21 | 3,053 | .078680410 |
| F1 | 204,356,477 | 0.8282 | 246,747,738 | 9 | 463 | .052085022 |
| F1 | 207,801,712 | 0.9742 | 213,304,980 | 7 | 123 | .036593330 |
| F1 | 212,264,341 | 1.0111 | 209,934,073 | 6 | 33 | .002399083 |
| F1 | 173,456,993 | 0.9758 | 177,758,755 | 2 | 3 | .001983597 |
| Random Totals: | 4,721,182,013 | 4,869,992,858 | 270 | 20,088 | ||
| Catg D1 Exception Values: | 11,638,410 | 8,861,283 | ||||
| Total Test Values (4): | 4,732,820,423 | 4,878,854,141 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 243,942,707 |
Confidence Interval Values (5)
| State Lower Limit: | 4,634,911,434 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 4,732,820,423 | (Within Confidence Interval) |
| State Upper Limit: | 5,122,796,848 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 5,216,540,233 | (See ISD Summary Worksheet) |
Sources:
(1) See Stratified Category Worksheet Reports PTS236, PTS430
(2) Number of parcels sampled by staff
(3) Total Category Parcels from Stratification Report, Appraisal Roll, or Self-report
(4) Includes any parcels in A, B, C, D3, F1, G1, G2, or L1 marked as exception properties
(5) Unstudied categories and sub-categories were not included in the Confidence Interval Values
(6) Includes local value of unstudied property categories and sub-categories