2008 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 | 936,968,227 | 0.9759 | 960,106,801 | 56 | 6,486 | .005884082 |
| A | 976,733,989 | 0.9938 | 982,827,520 | 63 | 4,934 | .008930385 |
| A | 991,112,445 | 0.9714 | 1,020,292,820 | 63 | 3,577 | .003949836 |
| A | 1,037,478,385 | 0.9643 | 1,075,887,571 | 61 | 1,991 | .005796613 |
| D3 | 270,506,607 | 0.8606 | 314,323,271 | 15 | 2,043 | .092717038 |
| F1 | 168,671,054 | 0.9215 | 183,039,668 | 7 | 315 | .034276274 |
| F1 | 162,189,559 | 0.9687 | 167,430,122 | 7 | 97 | .017279234 |
| F1 | 162,970,360 | 0.9932 | 164,086,146 | 6 | 35 | .003699674 |
| F1 | 255,675,080 | 1.0357 | 246,862,103 | 4 | 12 | .004260803 |
| Random Totals: | 4,962,305,706 | 5,114,856,022 | 282 | 19,490 | ||
| Catg D1 Exception Values: | 2,744,020 | 2,479,660 | ||||
| Total Test Values (4): | 4,965,049,726 | 5,117,335,682 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 255,866,784 |
Confidence Interval Values (5)
| State Lower Limit: | 4,861,468,898 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 4,965,049,726 | (Within Confidence Interval) |
| State Upper Limit: | 5,373,202,466 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 5,579,585,454 | (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