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 | 772,903,301 | 0.9895 | 781,104,902 | 50 | 4,123 | .000839845 |
| A | 773,345,022 | 0.9924 | 779,267,455 | 50 | 2,858 | .000857245 |
| A | 772,542,524 | 0.9941 | 777,127,577 | 50 | 2,241 | .000563645 |
| A | 772,594,786 | 0.9828 | 786,115,981 | 50 | 1,444 | .001209350 |
| F1 | 568,887,556 | 0.7100 | 801,250,079 | 7 | 156 | .026930853 |
| F1 | 573,998,771 | 0.7907 | 725,937,487 | 6 | 65 | .027854063 |
| F1 | 564,487,092 | 0.9630 | 586,175,589 | 6 | 36 | .031276774 |
| F1 | 549,498,145 | 0.9908 | 554,600,469 | 5 | 18 | .018772743 |
| L1 | 385,903,115 | 1.1105 | 347,503,931 | 7 | 272 | .014485311 |
| L1 | 390,610,569 | 1.1049 | 353,525,721 | 7 | 60 | .006139652 |
| L1 | 399,007,048 | 1.0616 | 375,854,416 | 6 | 22 | .010482772 |
| L1 | 357,401,190 | 0.9944 | 359,413,908 | 5 | 7 | .007526086 |
| Random Totals: | 6,881,179,119 | 7,227,877,515 | 249 | 11,302 | ||
| Catg D1 Exception Values: | 177,418 | 150,173 | ||||
| Total Test Values (4): | 6,881,356,537 | 7,228,027,688 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 361,401,384 |
Confidence Interval Values (5)
| State Lower Limit: | 6,866,626,304 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 6,881,356,537 | (Within Confidence Interval) |
| State Upper Limit: | 7,589,429,072 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 7,280,278,249 | (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