2007 Confidence Interval Detail
227/Travis
227-901/Austin ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 7,555,767,206 | 0.9614 | 7,859,129,609 | 25 | 52,554 | .001962895 |
| A | 7,555,526,861 | 0.9639 | 7,838,496,588 | 25 | 33,817 | .004033888 |
| A | 7,555,895,854 | 0.9657 | 7,824,268,255 | 25 | 22,031 | .012093120 |
| A | 7,555,264,951 | 0.9651 | 7,828,478,863 | 25 | 10,489 | .004785633 |
| B | 1,676,939,764 | 0.9595 | 1,747,722,526 | 49 | 8,041 | .042646241 |
| B | 1,677,652,534 | 0.8616 | 1,947,136,182 | 43 | 1,294 | .294826488 |
| B | 1,691,082,216 | 0.9286 | 1,821,109,429 | 7 | 144 | .006048526 |
| B | 1,661,977,125 | 0.9397 | 1,768,625,226 | 7 | 52 | .005240420 |
| C | 173,994,641 | 0.9307 | 186,950,297 | 20 | 2,597 | .023041438 |
| C | 166,924,223 | 0.9577 | 174,296,985 | 18 | 651 | .024706542 |
| C | 170,518,746 | 0.9971 | 171,014,689 | 13 | 249 | .027411361 |
| C | 169,952,722 | 0.9947 | 170,858,271 | 6 | 48 | .009962269 |
| F1 | 3,253,575,781 | 0.8971 | 3,626,770,461 | 36 | 3,866 | .031830227 |
| F1 | 3,254,762,273 | 0.9097 | 3,577,841,347 | 11 | 841 | .016784370 |
| F1 | 3,261,126,055 | 0.9673 | 3,371,369,849 | 10 | 254 | .037849958 |
| F1 | 3,241,962,039 | 0.9720 | 3,335,351,892 | 9 | 67 | .004394153 |
| L1 | 759,479,349 | 0.9680 | 784,586,104 | 7 | 6,609 | .003676941 |
| L1 | 759,283,427 | 0.9644 | 787,311,724 | 8 | 1,233 | .006061859 |
| L1 | 762,378,049 | 1.0140 | 751,852,119 | 7 | 369 | .013274532 |
| L1 | 756,318,921 | 0.9765 | 774,520,144 | 8 | 98 | .005443734 |
| Random Totals: | 53,660,382,737 | 56,347,690,560 | 359 | 145,304 | ||
| Catg D1 Exception Values: | 1,892,365 | 1,597,161 | ||||
| Total Test Values (4): | 53,662,275,102 | 56,349,287,721 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 2,817,464,386 |
Confidence Interval Values (5)
| State Lower Limit: | 53,531,823,335 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 53,662,275,102 | (Within Confidence Interval) |
| State Upper Limit: | 59,166,752,107 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 53,030,915,597 | (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