2009 Confidence Interval Detail
220/Tarrant
220-902/Birdville ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 1,006,919,358 | 0.9797 | 1,027,783,360 | 18 | 11,639 | .007152945 |
| A | 1,046,746,455 | 0.9894 | 1,057,960,840 | 30 | 9,121 | .008516420 |
| A | 1,018,468,553 | 0.9884 | 1,030,421,442 | 22 | 6,724 | .004106081 |
| A | 1,116,838,832 | 0.9978 | 1,119,301,295 | 30 | 4,619 | .002311864 |
| B | 136,751,240 | 1.0384 | 131,694,183 | 7 | 535 | .001887720 |
| B | 130,917,354 | 0.9376 | 139,630,284 | 5 | 22 | .006284313 |
| B | 157,860,172 | 0.9909 | 159,309,892 | 4 | 13 | .010770115 |
| B | 88,130,727 | 0.9941 | 88,653,784 | 3 | 4 | .000843838 |
| F1 | 426,428,092 | 0.8697 | 490,316,307 | 13 | 919 | .011076473 |
| F1 | 423,130,233 | 0.8459 | 500,213,067 | 13 | 265 | .011706727 |
| F1 | 403,949,204 | 0.9058 | 445,958,494 | 11 | 88 | .019259337 |
| F1 | 411,247,083 | 0.8971 | 458,418,329 | 8 | 23 | .023275410 |
| L1 | 189,542,895 | 1.0093 | 187,796,389 | 8 | 1,068 | .042453671 |
| L1 | 200,144,931 | 1.1615 | 172,315,911 | 7 | 211 | .036351488 |
| L1 | 206,365,347 | 1.0550 | 195,606,964 | 6 | 56 | .006585496 |
| L1 | 236,200,954 | 1.0843 | 217,837,272 | 5 | 13 | .006664997 |
| Random Totals: | 7,199,641,430 | 7,423,217,813 | 190 | 35,320 | ||
| Catg D1 Exception Values: | 41,130 | 40,794 | ||||
| Total Test Values (4): | 7,199,682,560 | 7,423,258,607 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 371,162,930 |
Confidence Interval Values (5)
| State Lower Limit: | 7,052,095,677 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 7,199,682,560 | (Within Confidence Interval) |
| State Upper Limit: | 7,794,421,537 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 7,366,103,594 | (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