2009 Confidence Interval Detail
246/Williamson
246-909/Round Rock ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 2,255,472,634 | 0.9789 | 2,304,088,910 | 59 | 15,634 | .004738544 |
| A | 2,161,647,382 | 0.9857 | 2,193,007,388 | 55 | 11,461 | .006389647 |
| A | 2,131,322,713 | 0.9874 | 2,158,520,066 | 57 | 8,804 | .004303328 |
| A | 1,897,076,705 | 0.9782 | 1,939,354,636 | 57 | 5,456 | .006901697 |
| B | 375,818,263 | 0.9804 | 383,331,562 | 25 | 2,034 | .004475809 |
| B | 359,644,874 | 0.9412 | 382,113,126 | 6 | 46 | .008366044 |
| B | 661,146,968 | 0.9328 | 708,776,767 | 5 | 29 | .026923807 |
| B | 247,154,719 | 1.0059 | 245,705,059 | 5 | 7 | .001957223 |
| C | 76,948,374 | 0.7992 | 96,281,749 | 7 | 394 | .048668632 |
| C | 128,086,120 | 0.9411 | 136,102,561 | 9 | 147 | .011720336 |
| C | 108,915,424 | 0.9878 | 110,260,603 | 8 | 51 | .000829195 |
| C | 99,755,349 | 0.9584 | 104,085,297 | 7 | 15 | .003140305 |
| F1 | 782,133,432 | 0.9391 | 832,854,256 | 9 | 707 | .036674597 |
| F1 | 751,592,181 | 0.8366 | 898,388,933 | 7 | 174 | .090888101 |
| F1 | 870,829,542 | 0.9834 | 885,529,329 | 6 | 67 | .011679158 |
| F1 | 738,137,294 | 0.9697 | 761,201,706 | 5 | 16 | .017769586 |
| L1 | 185,404,879 | 1.0274 | 180,460,268 | 7 | 1,200 | .013964180 |
| L1 | 205,136,606 | 0.9698 | 211,524,650 | 8 | 258 | .007425046 |
| L1 | 166,940,703 | 1.0153 | 164,425,000 | 7 | 53 | .003984215 |
| L1 | 152,754,430 | 0.9055 | 168,696,223 | 5 | 14 | .033811382 |
| Random Totals: | 14,355,918,592 | 14,864,708,089 | 354 | 46,567 | ||
| Catg D1 Exception Values: | 1,810,325 | 1,405,401 | ||||
| Total Test Values (4): | 14,357,728,917 | 14,866,113,490 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 743,305,675 |
Confidence Interval Values (5)
| State Lower Limit: | 14,122,807,815 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 14,357,728,917 | (Within Confidence Interval) |
| State Upper Limit: | 15,609,419,165 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 15,107,276,934 | (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