2009 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 | 8,244,848,176 | 0.9923 | 8,308,826,137 | 100 | 51,735 | .005438595 |
| A | 9,655,667,691 | 0.9943 | 9,711,020,508 | 99 | 39,556 | .008049422 |
| A | 9,584,719,196 | 0.9877 | 9,704,079,372 | 100 | 26,028 | .007681684 |
| A | 9,735,216,493 | 0.9885 | 9,848,473,943 | 99 | 13,282 | .008261224 |
| B | 1,955,519,538 | 1.0554 | 1,852,870,512 | 56 | 7,573 | .016197924 |
| B | 1,904,547,399 | 0.9705 | 1,962,439,360 | 12 | 916 | .004803039 |
| B | 2,430,269,977 | 0.9771 | 2,487,227,486 | 7 | 158 | .015031132 |
| B | 1,744,111,026 | 1.0162 | 1,716,306,855 | 6 | 47 | .001655661 |
| C | 181,562,588 | 0.9698 | 187,216,527 | 21 | 2,101 | .024212546 |
| C | 166,042,887 | 0.9856 | 168,468,838 | 19 | 656 | .010723489 |
| C | 167,168,186 | 0.8580 | 194,834,716 | 7 | 269 | .080609499 |
| C | 142,941,022 | 1.0202 | 140,110,784 | 6 | 55 | .028232200 |
| F1 | 3,786,174,312 | 0.9841 | 3,847,347,131 | 49 | 4,174 | .017157451 |
| F1 | 3,736,519,905 | 0.9644 | 3,874,450,337 | 15 | 846 | .007647904 |
| F1 | 3,494,444,543 | 0.9636 | 3,626,447,222 | 16 | 227 | .001951859 |
| F1 | 3,315,289,661 | 0.9695 | 3,419,587,067 | 15 | 63 | .001389156 |
| L1 | 847,774,156 | 1.1384 | 744,706,743 | 7 | 6,590 | .042390565 |
| L1 | 832,767,229 | 0.9654 | 862,613,662 | 7 | 1,217 | .002491977 |
| L1 | 819,063,148 | 0.9735 | 841,359,166 | 7 | 348 | .007621230 |
| L1 | 877,753,679 | 1.0479 | 837,631,147 | 6 | 75 | .004584560 |
| Random Totals: | 63,622,400,812 | 64,336,017,513 | 654 | 155,916 | ||
| Catg D1 Exception Values: | 2,086,014 | 1,706,541 | ||||
| Total Test Values (4): | 63,624,486,826 | 64,337,724,054 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 3,216,886,203 |
Confidence Interval Values (5)
| State Lower Limit: | 61,120,837,851 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 63,624,486,826 | (Within Confidence Interval) |
| State Upper Limit: | 67,554,610,257 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 61,899,156,368 | (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