2007 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 | 772,750,403 | 0.9895 | 780,950,382 | 50 | 4,123 | .000839845 |
| A | 773,192,037 | 0.9924 | 779,113,298 | 50 | 2,858 | .000857245 |
| A | 772,389,698 | 0.9941 | 776,973,844 | 50 | 2,241 | .000563645 |
| A | 772,441,949 | 0.9828 | 785,960,469 | 50 | 1,444 | .001209350 |
| F1 | 566,126,209 | 0.7100 | 797,360,858 | 7 | 156 | .026930853 |
| F1 | 571,212,615 | 0.7907 | 722,413,830 | 6 | 65 | .027854063 |
| F1 | 561,747,104 | 0.9630 | 583,330,326 | 6 | 36 | .031276774 |
| F1 | 546,830,913 | 0.9908 | 551,908,471 | 5 | 18 | .018772743 |
| L1 | 384,410,570 | 1.1105 | 346,159,901 | 7 | 272 | .014485311 |
| L1 | 389,099,817 | 1.1049 | 352,158,401 | 7 | 60 | .006139652 |
| L1 | 397,463,821 | 1.0616 | 374,400,736 | 6 | 22 | .010482772 |
| L1 | 356,018,880 | 0.9944 | 358,023,813 | 5 | 7 | .007526086 |
| Random Totals: | 6,863,684,016 | 7,208,754,329 | 249 | 11,302 | ||
| Catg D1 Exception Values: | 177,418 | 149,912 | ||||
| Total Test Values (4): | 6,863,861,434 | 7,208,904,241 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 360,445,212 |
Confidence Interval Values (5)
| State Lower Limit: | 6,848,459,029 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 6,863,861,434 | (Within Confidence Interval) |
| State Upper Limit: | 7,569,349,453 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 7,130,941,583 | (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