2007 Confidence Interval Detail
057/Dallas
057-907/Duncanville ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 536,912,007 | 0.9998 | 537,019,411 | 22 | 5,681 | .002181002 |
| A | 536,617,428 | 0.9783 | 548,520,319 | 24 | 4,369 | .001327388 |
| A | 536,527,850 | 0.9723 | 551,813,072 | 23 | 3,368 | .002682461 |
| A | 536,622,192 | 0.9796 | 547,797,256 | 24 | 2,075 | .005622170 |
| B | 45,406,341 | 1.2637 | 35,931,266 | 7 | 258 | .035571071 |
| B | 45,553,878 | 0.8023 | 56,779,108 | 5 | 9 | .007175199 |
| B | 43,432,153 | 0.8121 | 53,481,287 | 5 | 6 | .054725643 |
| B | 42,297,561 | 0.9101 | 46,475,729 | 4 | 5 | .019559059 |
| F1 | 135,568,152 | 0.8126 | 166,832,577 | 7 | 390 | .097709167 |
| F1 | 135,006,516 | 0.9438 | 143,045,683 | 7 | 126 | .013302666 |
| F1 | 136,414,166 | 0.9174 | 148,696,497 | 6 | 50 | .056327271 |
| F1 | 132,809,825 | 0.9583 | 138,588,986 | 6 | 19 | .022115829 |
| L1 | 63,194,454 | 1.0856 | 58,211,546 | 7 | 425 | .008398868 |
| L1 | 62,751,926 | 1.1313 | 55,468,864 | 7 | 61 | .029729462 |
| L1 | 68,996,389 | 1.0103 | 68,292,971 | 7 | 18 | .017256101 |
| L1 | 56,819,268 | 1.0285 | 55,244,791 | 5 | 6 | .003897060 |
| Random Totals: | 3,114,930,106 | 3,212,199,363 | 166 | 16,866 | ||
| Catg D1 Exception Values: | 122,105 | 134,046 | ||||
| Total Test Values (4): | 3,115,052,211 | 3,212,333,409 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 160,616,670 |
Confidence Interval Values (5)
| State Lower Limit: | 3,051,716,739 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 3,115,052,211 | (Within Confidence Interval) |
| State Upper Limit: | 3,372,950,079 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 3,495,429,274 | (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