2006 Confidence Interval Detail
170/Montgomery
170-904/Willis ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 273,081,413 | 0.9400 | 290,512,141 | 31 | 3,918 | .029443095 |
| A | 272,912,635 | 0.9740 | 280,197,777 | 35 | 2,012 | .009699750 |
| A | 273,176,467 | 0.9418 | 290,057,833 | 31 | 1,273 | .009405590 |
| A | 272,786,250 | 0.9210 | 296,184,853 | 23 | 645 | .013705508 |
| C | 25,261,227 | 0.9517 | 26,543,267 | 8 | 4,164 | .004918438 |
| C | 25,280,980 | 1.0485 | 24,111,569 | 10 | 1,209 | .024565147 |
| C | 25,278,785 | 1.0189 | 24,809,878 | 8 | 446 | .035767272 |
| C | 25,179,739 | 0.9815 | 25,654,344 | 12 | 169 | .001876985 |
| D3 | 54,489,875 | 0.9613 | 56,683,528 | 10 | 1,965 | .021328240 |
| F1 | 26,991,155 | 0.9498 | 28,417,725 | 7 | 212 | .004505244 |
| F1 | 26,880,892 | 0.9678 | 27,775,255 | 6 | 64 | .007151182 |
| F1 | 26,807,393 | 0.9493 | 28,239,116 | 6 | 27 | .017232752 |
| F1 | 26,679,186 | 0.9617 | 27,741,693 | 5 | 7 | .012502476 |
| L1 | 20,162,173 | 0.9470 | 21,290,573 | 7 | 281 | .006133519 |
| L1 | 20,126,199 | 0.9581 | 21,006,366 | 7 | 63 | .220937638 |
| L1 | 20,369,882 | 0.9969 | 20,433,225 | 6 | 13 | .004573001 |
| Random Totals: | 1,415,464,251 | 1,489,659,143 | 212 | 16,468 | ||
| Catg D1 Exception Values: | 33,135,840 | 32,442,999 | ||||
| Catg L1 Exception Values: | 18,127,837 | 19,442,774 | ||||
| Total Test Values (4): | 1,466,727,928 | 1,541,544,916 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 77,077,246 |
Confidence Interval Values (5)
| State Lower Limit: | 1,464,467,670 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 1,466,727,928 | (Within Confidence Interval) |
| State Upper Limit: | 1,618,622,162 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 1,445,279,355 | (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