2008 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 | 553,364,810 | 1.0438 | 530,144,482 | 22 | 6,043 | .011939774 |
| A | 501,306,830 | 0.9895 | 506,626,407 | 23 | 4,174 | .002457894 |
| A | 531,707,310 | 1.0151 | 523,797,961 | 23 | 3,422 | .003736970 |
| A | 546,218,350 | 0.9933 | 549,902,698 | 31 | 2,149 | .001377458 |
| B | 43,978,060 | 1.0262 | 42,855,252 | 7 | 218 | .002032286 |
| B | 44,712,830 | 0.7379 | 60,594,701 | 5 | 9 | .045254173 |
| B | 47,122,630 | 1.0122 | 46,554,663 | 4 | 7 | .002523984 |
| B | 48,419,880 | 0.9211 | 52,567,452 | 3 | 6 | .005244085 |
| F1 | 140,556,720 | 0.9401 | 149,512,520 | 7 | 387 | .007909352 |
| F1 | 146,807,950 | 0.9091 | 161,487,130 | 7 | 135 | .018960228 |
| F1 | 152,065,040 | 0.9448 | 160,949,450 | 6 | 57 | .033756609 |
| F1 | 159,198,420 | 0.9742 | 163,414,514 | 5 | 22 | .010181893 |
| L1 | 65,888,020 | 1.0347 | 63,678,380 | 7 | 406 | .017445177 |
| L1 | 76,242,180 | 1.0193 | 74,798,568 | 6 | 65 | .013338789 |
| L1 | 51,343,180 | 1.0323 | 49,736,685 | 5 | 13 | .029483427 |
| L1 | 55,261,150 | 1.0171 | 54,332,072 | 3 | 6 | .000338074 |
| Random Totals: | 3,164,193,360 | 3,190,952,935 | 164 | 17,119 | ||
| Catg D1 Exception Values: | 103,338 | 111,374 | ||||
| Total Test Values (4): | 3,164,296,698 | 3,191,064,309 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 159,553,215 |
Confidence Interval Values (5)
| State Lower Limit: | 3,031,511,094 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 3,164,296,698 | (Within Confidence Interval) |
| State Upper Limit: | 3,350,617,524 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 3,457,994,567 | (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