2009 Confidence Interval Detail
226/Tom Green
226-907/Grape Creek ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 29,092,540 | 1.0058 | 28,924,776 | 16 | 798 | .017434705 |
| A | 27,651,836 | 1.0255 | 26,964,248 | 16 | 388 | .008675259 |
| A | 28,155,050 | 0.9520 | 29,574,632 | 16 | 270 | .016142162 |
| A | 30,580,250 | 1.0318 | 29,637,769 | 16 | 178 | .020270561 |
| D3 | 14,158,015 | 0.9883 | 14,325,625 | 28 | 1,080 | .010976758 |
| Random Totals: | 129,637,691 | 129,427,050 | 92 | 2,714 | ||
| Catg D1 Exception Values: | 5,975,230 | 6,041,037 | ||||
| Total Test Values (4): | 135,612,921 | 135,468,087 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 6,773,404 |
Confidence Interval Values (5)
| State Lower Limit: | 128,694,683 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 135,612,921 | (Within Confidence Interval) |
| State Upper Limit: | 142,241,491 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 128,770,984 | (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