2008 Confidence Interval Detail
228/Trinity
228-904/Centerville ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 1,165,408 | 0.6403 | 1,820,097 | 12 | 53 | .145937277 |
| A | 1,038,819 | 0.5214 | 1,992,365 | 9 | 28 | .034751846 |
| A | 1,208,778 | 0.5217 | 2,316,998 | 8 | 20 | .023748210 |
| A | 1,221,103 | 0.5898 | 2,070,368 | 6 | 11 | .017672530 |
| D3 | 8,781,506 | 0.8594 | 10,218,182 | 23 | 1,216 | .027124657 |
| G1 | 2,498,021 | 0.7343 | 3,401,908 | 6 | 7 | .121068229 |
| Random Totals: | 15,913,635 | 21,819,918 | 64 | 1,335 | ||
| Catg D1 Exception Values: | 8,097,792 | 11,663,630 | ||||
| Catg G1 Exception Values: | 4,640,185 | 3,834,739 | ||||
| Total Test Values (4): | 28,651,612 | 37,318,287 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 1,865,914 |
Confidence Interval Values (5)
| Local Test Value: | 28,651,612 | (Outside Confidence Interval) |
|---|---|---|
| State Lower Limit: | 35,452,373 | (State Test Value minus Margin of Error Percent) |
| State Upper Limit: | 39,184,201 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 26,146,259 | (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