2006 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 | 506,961,264 | 1.0174 | 498,291,001 | 46 | 5,447 | .001653629 |
| A | 506,970,283 | 1.0091 | 502,398,457 | 45 | 4,253 | .001558727 |
| A | 506,727,926 | 1.0097 | 501,859,885 | 46 | 3,312 | .004437509 |
| A | 506,807,324 | 1.0172 | 498,237,637 | 48 | 2,069 | .002687218 |
| B | 40,631,689 | 0.9989 | 40,676,433 | 7 | 256 | .000525188 |
| B | 41,354,959 | 0.8370 | 49,408,553 | 7 | 9 | .001487907 |
| B | 38,751,526 | 0.7803 | 49,662,343 | 5 | 6 | .089767431 |
| F1 | 123,275,838 | 1.0189 | 120,989,143 | 7 | 382 | .060818969 |
| F1 | 123,881,897 | 0.9527 | 130,032,431 | 7 | 129 | .051854107 |
| F1 | 124,599,260 | 0.9762 | 127,637,021 | 6 | 51 | .035217442 |
| F1 | 120,440,030 | 1.0087 | 119,401,239 | 5 | 22 | .001709575 |
| L1 | 63,055,081 | 1.1060 | 57,011,827 | 7 | 467 | .030244564 |
| L1 | 63,432,264 | 1.0894 | 58,226,789 | 6 | 72 | .021407583 |
| L1 | 66,170,325 | 1.0914 | 60,628,848 | 7 | 20 | .007614465 |
| Random Totals: | 2,833,059,666 | 2,814,461,607 | 249 | 16,495 | ||
| Catg D1 Exception Values: | 82,364 | 83,531 | ||||
| Catg B Exception Values: | 38,260,200 | 46,020,000 | ||||
| Catg L1 Exception Values: | 55,645,800 | 55,345,801 | ||||
| Total Test Values (4): | 2,927,048,030 | 2,915,910,939 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 145,795,547 |
Confidence Interval Values (5)
| State Lower Limit: | 2,770,115,392 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 2,927,048,030 | (Within Confidence Interval) |
| State Upper Limit: | 3,061,706,486 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 3,239,918,317 | (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