2007 Confidence Interval Detail
189/Presidio
189-901/Marfa ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 12,968,615 | 0.8403 | 15,433,315 | 22 | 382 | .035208136 |
| A | 12,950,471 | 0.9521 | 13,602,007 | 24 | 214 | .040517869 |
| A | 13,037,687 | 1.0174 | 12,814,711 | 19 | 145 | .050856235 |
| A | 12,878,104 | 1.1501 | 11,197,378 | 25 | 84 | .021873887 |
| D3 | 16,246,926 | 1.0902 | 14,902,702 | 35 | 4,783 | .037396517 |
| F1 | 3,199,806 | 0.8648 | 3,700,053 | 19 | 77 | .041096879 |
| F1 | 3,084,249 | 1.0420 | 2,959,932 | 17 | 29 | .035295183 |
| F1 | 3,564,745 | 0.9896 | 3,602,208 | 8 | 10 | .018293352 |
| Random Totals: | 77,930,603 | 78,212,306 | 169 | 5,724 | ||
| Catg J Exception Values: | 16,224,546 | 16,242,954 | ||||
| Catg D1 Exception Values: | 12,964,500 | 14,951,284 | ||||
| Catg F1 Exception Values: | 2,190,680 | 2,203,336 | ||||
| Total Test Values (4): | 109,310,329 | 111,609,880 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 5,580,494 |
Confidence Interval Values (5)
| State Lower Limit: | 106,029,386 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 109,310,329 | (Within Confidence Interval) |
| State Upper Limit: | 117,190,374 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 121,375,955 | (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