2009 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 | 423,431,980 | 1.0854 | 390,116,068 | 25 | 4,847 | .023104518 |
| A | 508,655,860 | 1.0063 | 505,471,390 | 23 | 4,248 | .010960266 |
| A | 508,347,840 | 1.0290 | 494,021,224 | 24 | 3,287 | .015429018 |
| A | 426,129,560 | 1.0519 | 405,104,630 | 24 | 1,742 | .013707172 |
| B | 47,989,490 | 0.9281 | 51,707,241 | 7 | 222 | .009048709 |
| B | 56,139,060 | 0.9489 | 59,162,251 | 4 | 11 | .002347306 |
| B | 13,526,680 | 1.0117 | 13,370,248 | 2 | 2 | .000004038 |
| B | 67,388,910 | 0.9903 | 68,048,985 | 3 | 8 | .001944026 |
| F1 | 151,097,910 | 0.8962 | 168,598,427 | 8 | 390 | .019498066 |
| F1 | 157,884,340 | 0.8182 | 192,965,461 | 8 | 132 | .038322261 |
| F1 | 126,873,180 | 0.8267 | 153,469,433 | 6 | 45 | .017400302 |
| F1 | 135,208,620 | 0.8921 | 151,562,179 | 5 | 18 | .010480379 |
| L1 | 60,233,840 | 1.0289 | 58,541,977 | 7 | 383 | .007651792 |
| L1 | 67,425,710 | 1.0141 | 66,488,226 | 6 | 66 | .005462653 |
| L1 | 54,280,870 | 0.9583 | 56,642,878 | 5 | 17 | .056144770 |
| L1 | 70,367,050 | 1.0248 | 68,664,178 | 4 | 9 | .000022830 |
| Random Totals: | 2,874,980,900 | 2,903,934,796 | 161 | 15,427 | ||
| Catg D1 Exception Values: | 109,898 | 110,230 | ||||
| Total Test Values (4): | 2,875,090,798 | 2,904,045,026 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 145,202,251 |
Confidence Interval Values (5)
| State Lower Limit: | 2,758,842,775 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 2,875,090,798 | (Within Confidence Interval) |
| State Upper Limit: | 3,049,247,277 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 3,284,410,191 | (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