2009 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 | 14,879,420 | 0.8942 | 16,639,924 | 17 | 388 | .048426486 |
| A | 15,028,590 | 0.9416 | 15,960,695 | 16 | 221 | .051542946 |
| A | 14,872,710 | 1.0307 | 14,429,718 | 15 | 147 | .020511739 |
| A | 16,045,202 | 1.1077 | 14,485,151 | 15 | 93 | .026587259 |
| D3 | 16,747,517 | 0.9372 | 17,869,736 | 21 | 5,153 | .086947428 |
| F1 | 3,193,690 | 0.9317 | 3,427,809 | 6 | 74 | .019217085 |
| F1 | 3,608,990 | 1.0093 | 3,575,736 | 6 | 34 | .018288933 |
| F1 | 4,062,610 | 0.8473 | 4,794,772 | 5 | 16 | .037946869 |
| F1 | 2,634,546 | 0.2808 | 9,382,286 | 2 | 3 | .706808740 |
| Random Totals: | 91,073,275 | 100,565,827 | 103 | 6,129 | ||
| Catg J Exception Values: | 18,494,132 | 18,610,747 | ||||
| Catg D1 Exception Values: | 12,905,230 | 15,514,768 | ||||
| Total Test Values (4): | 122,472,637 | 134,691,342 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 6,734,567 |
Confidence Interval Values (5)
| Local Test Value: | 122,472,637 | (Outside Confidence Interval) |
|---|---|---|
| State Lower Limit: | 127,956,775 | (State Test Value minus Margin of Error Percent) |
| State Upper Limit: | 141,425,909 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 131,994,405 | (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