2012 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 | 15,316,950 | 0.8884 | 17,241,051 | 15 | 384 | .003242071 |
| A | 15,592,010 | 0.9052 | 17,224,934 | 15 | 220 | .010687293 |
| A | 15,671,290 | 0.9145 | 17,136,457 | 15 | 151 | .004620142 |
| A | 15,993,390 | 0.9431 | 16,958,318 | 15 | 97 | .016266888 |
| D3 | 18,048,650 | 0.9219 | 19,577,666 | 20 | 5,264 | .020282312 |
| F1 | 3,705,210 | 0.8178 | 4,530,704 | 16 | 68 | .018168844 |
| F1 | 3,920,610 | 0.8204 | 4,778,901 | 17 | 33 | .011504773 |
| Random Totals: | 88,248,110 | 97,448,031 | 113 | 6,217 | ||
| Catg D1 Exception Values: | 12,874,660 | 16,866,218 | ||||
| Catg F1 Exception Values: | 8,021,806 | 12,543,510 | ||||
| Total Test Values (4): | 109,144,576 | 126,857,759 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 6,342,888 |
Confidence Interval Values (5)
| Local Test Value: | 109,144,576 | (Outside Confidence Interval) |
|---|---|---|
| State Lower Limit: | 120,514,871 | (State Test Value minus Margin of Error Percent) |
| State Upper Limit: | 133,200,647 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 165,233,631 | (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