2011 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 | 15,158,140 | 0.6690 | 22,657,907 | 10 | 381 | .382546603 |
| A | 15,381,080 | 0.8207 | 18,741,416 | 11 | 219 | .080676573 |
| A | 15,807,060 | 0.9113 | 17,345,616 | 10 | 153 | .037651980 |
| A | 15,686,622 | 0.8247 | 19,021,004 | 10 | 96 | .033061093 |
| D3 | 18,434,917 | 0.9749 | 18,909,547 | 18 | 5,222 | .004828725 |
| F1 | 4,071,030 | 0.8630 | 4,717,300 | 11 | 72 | .025838681 |
| F1 | 3,208,680 | 0.9496 | 3,378,981 | 8 | 27 | .001340144 |
| F1 | 4,706,030 | 0.9555 | 4,925,201 | 12 | 17 | .024188223 |
| F1 | 3,212,536 | 0.3762 | 8,539,436 | 3 | 4 | .998206253 |
| Random Totals: | 95,666,095 | 118,236,408 | 93 | 6,191 | ||
| Catg J Exception Values: | 23,533,832 | 23,781,219 | ||||
| Catg D1 Exception Values: | 12,860,040 | 16,285,213 | ||||
| Total Test Values (4): | 132,059,967 | 158,302,840 |
Margin of Error
| Margin of Error Percent: | 6.8594152 |
|---|---|
| Margin of Error Value: | 10,858,649 |
Confidence Interval Values (5)
| Local Test Value: | 132,059,967 | (Outside Confidence Interval) |
|---|---|---|
| State Lower Limit: | 147,444,191 | (State Test Value minus Margin of Error Percent) |
| State Upper Limit: | 169,161,489 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 166,757,219 | (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