2009 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 | 1,137,219 | 0.8191 | 1,388,376 | 14 | 51 | .107646938 |
| A | 1,154,735 | 0.6962 | 1,658,625 | 15 | 30 | .054245245 |
| A | 1,078,431 | 0.6982 | 1,544,588 | 12 | 17 | .044059642 |
| A | 1,195,367 | 0.8805 | 1,357,600 | 7 | 11 | .045819392 |
| D3 | 9,600,721 | 0.8392 | 11,440,325 | 25 | 1,181 | .139852863 |
| G1 | 990,341 | 1.0032 | 987,182 | 5 | 6 | .009723642 |
| Random Totals: | 15,156,814 | 18,376,696 | 78 | 1,296 | ||
| Catg D1 Exception Values: | 9,383,004 | 9,126,965 | ||||
| Catg G1 Exception Values: | 3,051,502 | 2,981,346 | ||||
| Total Test Values (4): | 27,591,320 | 30,485,007 |
Margin of Error
| Margin of Error Percent: | 5.6143041 |
|---|---|
| Margin of Error Value: | 1,711,521 |
Confidence Interval Values (5)
| Local Test Value: | 27,591,320 | (Outside Confidence Interval) |
|---|---|---|
| State Lower Limit: | 28,773,486 | (State Test Value minus Margin of Error Percent) |
| State Upper Limit: | 32,196,528 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 26,722,198 | (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