2009 Confidence Interval Detail
227/Travis
227-910/Del Valle ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 215,716,576 | 0.9731 | 221,679,762 | 25 | 2,625 | .022118992 |
| A | 266,857,484 | 0.9729 | 274,290,764 | 33 | 2,375 | .009342134 |
| A | 314,957,544 | 1.0207 | 308,570,142 | 56 | 2,272 | .006244239 |
| A | 293,618,617 | 1.0573 | 277,706,060 | 26 | 1,437 | .011048645 |
| B | 96,643,608 | 0.9935 | 97,275,901 | 6 | 80 | .000646199 |
| B | 73,158,287 | 0.9853 | 74,249,758 | 4 | 6 | .006806883 |
| B | 144,786,371 | 0.9802 | 147,711,050 | 5 | 6 | .003190280 |
| D3 | 138,503,569 | 1.0274 | 134,809,781 | 10 | 2,991 | .004701989 |
| F1 | 164,566,844 | 1.0117 | 162,663,679 | 7 | 250 | .003517349 |
| F1 | 149,475,893 | 0.9867 | 151,490,720 | 6 | 50 | .009254808 |
| F1 | 164,899,373 | 0.9826 | 167,819,431 | 7 | 22 | .007616983 |
| F1 | 144,151,103 | 1.0159 | 141,894,973 | 4 | 8 | .001085207 |
| L1 | 128,554,373 | 1.0545 | 121,910,264 | 8 | 248 | .071337906 |
| L1 | 126,178,589 | 0.9756 | 129,334,347 | 7 | 40 | .013584362 |
| L1 | 111,757,948 | 0.9938 | 112,455,170 | 5 | 12 | .027956860 |
| L1 | 106,596,392 | 0.9973 | 106,884,981 | 3 | 5 | .000113072 |
| Random Totals: | 2,640,422,571 | 2,630,746,783 | 212 | 12,427 | ||
| Catg D1 Exception Values: | 9,337,023 | 7,784,468 | ||||
| Total Test Values (4): | 2,649,759,594 | 2,638,531,251 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 131,926,563 |
Confidence Interval Values (5)
| State Lower Limit: | 2,506,604,688 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 2,649,759,594 | (Within Confidence Interval) |
| State Upper Limit: | 2,770,457,814 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 3,189,092,969 | (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