2009 Confidence Interval Detail
199/Rockwall
199-901/Rockwall ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 999,820,003 | 0.9613 | 1,040,070,741 | 21 | 6,816 | .022048646 |
| A | 991,764,007 | 1.0162 | 975,953,559 | 23 | 4,924 | .006031410 |
| A | 1,012,140,111 | 0.9305 | 1,087,737,895 | 21 | 3,553 | .075248378 |
| A | 1,022,383,054 | 0.9445 | 1,082,459,560 | 23 | 1,890 | .019104724 |
| D3 | 262,274,965 | 0.9107 | 287,992,714 | 11 | 2,068 | .065915230 |
| F1 | 197,662,698 | 0.9381 | 210,705,360 | 9 | 317 | .040508012 |
| F1 | 216,844,437 | 0.9768 | 221,994,714 | 9 | 104 | .011265740 |
| F1 | 182,488,725 | 0.9614 | 189,815,607 | 6 | 27 | .000797551 |
| F1 | 212,144,840 | 1.0610 | 199,948,011 | 5 | 7 | .011357436 |
| L1 | 59,092,320 | 1.0940 | 54,014,918 | 8 | 567 | .010945592 |
| L1 | 64,306,150 | 1.0362 | 62,059,593 | 7 | 127 | .014252765 |
| L1 | 63,724,850 | 0.9993 | 63,769,489 | 5 | 25 | .003867205 |
| L1 | 63,025,700 | 0.8203 | 76,832,500 | 3 | 5 | .042136622 |
| Random Totals: | 5,347,671,860 | 5,553,354,661 | 151 | 20,430 | ||
| Catg D1 Exception Values: | 2,725,560 | 2,396,431 | ||||
| Total Test Values (4): | 5,350,397,420 | 5,555,751,092 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 277,787,555 |
Confidence Interval Values (5)
| State Lower Limit: | 5,277,963,537 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 5,350,397,420 | (Within Confidence Interval) |
| State Upper Limit: | 5,833,538,647 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 5,715,742,549 | (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