2010 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 | 511,071,780 | 0.9794 | 521,821,299 | 25 | 6,390 | .007431710 |
| A | 502,811,050 | 0.9821 | 511,975,410 | 25 | 4,407 | .003353506 |
| A | 498,928,150 | 0.9858 | 506,114,983 | 25 | 3,371 | .002663862 |
| A | 462,113,560 | 0.9864 | 468,484,955 | 25 | 1,996 | .004637536 |
| B | 50,381,720 | 0.9844 | 51,180,130 | 12 | 188 | .004212926 |
| B | 43,662,870 | 0.7356 | 59,356,811 | 5 | 9 | .039674233 |
| B | 54,401,880 | 0.9202 | 59,119,626 | 4 | 8 | .003220902 |
| B | 24,081,100 | 0.9297 | 25,902,011 | 2 | 2 | .001252765 |
| F1 | 146,106,610 | 0.8993 | 162,467,041 | 10 | 388 | .027218966 |
| F1 | 141,630,500 | 0.9381 | 150,975,909 | 9 | 130 | .059597548 |
| F1 | 136,787,730 | 0.8884 | 153,970,880 | 9 | 55 | .032682562 |
| F1 | 124,733,740 | 0.9474 | 131,659,004 | 7 | 18 | .004189815 |
| L1 | 62,530,850 | 1.0936 | 57,178,905 | 10 | 381 | .010441867 |
| L1 | 57,953,350 | 1.0084 | 57,470,597 | 9 | 60 | .007707901 |
| L1 | 64,002,860 | 1.0272 | 62,308,080 | 7 | 19 | .075183080 |
| L1 | 45,040,150 | 1.0118 | 44,514,874 | 4 | 6 | .000163572 |
| Random Totals: | 2,926,237,900 | 3,024,500,515 | 188 | 17,428 | ||
| Catg J Exception Values: | 51,214,542 | 57,257,460 | ||||
| Catg D1 Exception Values: | 108,130 | 100,746 | ||||
| Total Test Values (4): | 2,977,560,572 | 3,081,858,721 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 154,092,936 |
Confidence Interval Values (5)
| State Lower Limit: | 2,927,765,785 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 2,977,560,572 | (Within Confidence Interval) |
| State Upper Limit: | 3,235,951,657 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 3,192,275,922 | (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