2008 Confidence Interval Detail
227/Travis
227-910/Del Valle ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 223,387,062 | 0.9698 | 230,343,434 | 55 | 2,847 | .028688444 |
| A | 246,914,995 | 0.9703 | 254,472,838 | 53 | 2,278 | .011548642 |
| A | 225,451,060 | 1.0107 | 223,064,272 | 57 | 1,728 | .013245469 |
| A | 330,591,412 | 1.0315 | 320,495,794 | 57 | 1,740 | .013090280 |
| B | 73,618,318 | 0.7708 | 95,508,975 | 6 | 61 | .007266512 |
| B | 80,720,395 | 0.9864 | 81,833,328 | 4 | 7 | .001524535 |
| B | 76,801,481 | 0.9745 | 78,811,166 | 3 | 4 | .000340278 |
| D3 | 136,776,464 | 1.0710 | 127,709,117 | 14 | 3,048 | .072480850 |
| F1 | 155,303,206 | 0.9779 | 158,812,973 | 7 | 240 | .014934270 |
| F1 | 179,621,134 | 0.9522 | 188,638,032 | 6 | 55 | .011796707 |
| F1 | 169,538,125 | 0.9658 | 175,541,649 | 5 | 20 | .003835165 |
| F1 | 122,712,056 | 0.9918 | 123,726,614 | 4 | 5 | .006290358 |
| L1 | 108,858,086 | 0.9780 | 111,306,836 | 7 | 251 | .001332415 |
| L1 | 129,403,186 | 0.9808 | 131,936,364 | 6 | 50 | .001583075 |
| L1 | 134,632,536 | 0.9975 | 134,969,961 | 5 | 18 | .004902369 |
| L1 | 136,914,076 | 0.9995 | 136,982,567 | 3 | 7 | .000000258 |
| Random Totals: | 2,531,243,592 | 2,574,153,920 | 292 | 12,359 | ||
| Catg D1 Exception Values: | 9,512,590 | 7,248,279 | ||||
| Catg B Exception Values: | 85,564,463 | 87,250,000 | ||||
| Total Test Values (4): | 2,626,320,645 | 2,668,652,199 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 133,432,610 |
Confidence Interval Values (5)
| State Lower Limit: | 2,535,219,589 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 2,626,320,645 | (Within Confidence Interval) |
| State Upper Limit: | 2,802,084,809 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 3,252,921,349 | (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