2008 Confidence Interval Detail
057/Dallas
057-922/Coppell ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 781,534,320 | 0.9842 | 794,080,797 | 33 | 4,162 | .000967460 |
| A | 770,435,820 | 0.9814 | 785,037,518 | 34 | 2,882 | .000791046 |
| A | 840,198,440 | 0.9762 | 860,682,688 | 34 | 2,466 | .001074427 |
| A | 859,548,930 | 0.9864 | 871,399,970 | 34 | 1,643 | .000748732 |
| F1 | 567,718,060 | 0.9357 | 606,730,854 | 10 | 165 | .008203145 |
| F1 | 640,172,140 | 0.9148 | 699,794,644 | 7 | 77 | .022232615 |
| F1 | 527,577,270 | 0.9053 | 582,765,128 | 7 | 34 | .029578107 |
| F1 | 686,696,340 | 0.8722 | 787,315,226 | 6 | 24 | .032333192 |
| L1 | 419,127,320 | 1.0145 | 413,136,836 | 7 | 297 | .000635657 |
| L1 | 409,131,580 | 1.0247 | 399,269,620 | 6 | 67 | .024204133 |
| L1 | 419,609,460 | 1.0323 | 406,480,151 | 5 | 24 | .002960281 |
| L1 | 345,076,150 | 0.9873 | 349,514,990 | 4 | 9 | .010445523 |
| Random Totals: | 7,266,825,830 | 7,556,208,422 | 187 | 11,850 | ||
| Catg D1 Exception Values: | 181,183 | 152,386 | ||||
| Total Test Values (4): | 7,267,007,013 | 7,556,360,808 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 377,818,040 |
Confidence Interval Values (5)
| State Lower Limit: | 7,178,542,768 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 7,267,007,013 | (Within Confidence Interval) |
| State Upper Limit: | 7,934,178,848 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 7,603,211,387 | (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