2009 Confidence Interval Detail
220/Tarrant
220-907/Keller ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 2,126,956,201 | 1.0115 | 2,102,774,297 | 21 | 16,352 | .002270640 |
| A | 2,083,125,746 | 1.0141 | 2,054,162,061 | 27 | 11,115 | .006406756 |
| A | 2,166,603,288 | 0.9868 | 2,195,585,010 | 25 | 7,891 | .003632293 |
| A | 2,236,480,074 | 0.9989 | 2,238,942,911 | 25 | 4,098 | .002927521 |
| B | 144,565,670 | 0.7122 | 202,984,653 | 8 | 122 | .016408392 |
| B | 184,552,003 | 0.9562 | 193,005,650 | 6 | 8 | .004349365 |
| F1 | 315,607,376 | 0.9300 | 339,362,770 | 9 | 342 | .008307245 |
| F1 | 313,272,998 | 0.9140 | 342,749,451 | 7 | 123 | .017834817 |
| F1 | 268,186,899 | 0.8876 | 302,148,377 | 8 | 40 | .003256027 |
| F1 | 383,792,984 | 0.9424 | 407,250,620 | 5 | 14 | .026624227 |
| L1 | 82,492,864 | 1.0819 | 76,248,141 | 7 | 688 | .019927088 |
| L1 | 84,826,255 | 1.1071 | 76,620,229 | 7 | 137 | .014507571 |
| L1 | 102,811,565 | 1.0145 | 101,342,104 | 6 | 38 | .014489840 |
| L1 | 84,446,849 | 1.1561 | 73,044,589 | 3 | 7 | .030994733 |
| Random Totals: | 10,577,720,772 | 10,706,220,863 | 164 | 40,975 | ||
| Catg D1 Exception Values: | 404,250 | 362,878 | ||||
| Total Test Values (4): | 10,578,125,022 | 10,706,583,741 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 535,329,187 |
Confidence Interval Values (5)
| State Lower Limit: | 10,171,254,554 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 10,578,125,022 | (Within Confidence Interval) |
| State Upper Limit: | 11,241,912,928 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 10,839,061,530 | (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