2008 Confidence Interval Detail
187/Polk
187-901/Big Sandy ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 6,738,289 | 0.8144 | 8,273,931 | 7 | 291 | .027782360 |
| A | 7,503,359 | 0.9479 | 7,915,771 | 11 | 162 | .035625151 |
| A | 6,981,310 | 0.9286 | 7,518,103 | 10 | 92 | .007654015 |
| A | 7,759,810 | 0.9507 | 8,162,207 | 11 | 60 | .013780759 |
| D3 | 15,650,168 | 1.0571 | 14,804,813 | 11 | 1,249 | .085230332 |
| G1 | 51,397,140 | 0.9470 | 54,273,643 | 5 | 16 | .076602566 |
| G1 | 53,463,200 | 0.9423 | 56,736,920 | 4 | 10 | .010943718 |
| G1 | 52,574,550 | 0.9937 | 52,907,870 | 4 | 7 | .006689870 |
| G1 | 42,455,570 | 0.9328 | 45,514,119 | 3 | 4 | .009970094 |
| Random Totals: | 244,523,396 | 256,107,377 | 66 | 1,891 | ||
| Catg D1 Exception Values: | 18,566,285 | 18,455,280 | ||||
| Total Test Values (4): | 263,089,681 | 274,562,657 |
Margin of Error
| Margin of Error Percent: | 5.0000001 |
|---|---|
| Margin of Error Value: | 13,728,133 |
Confidence Interval Values (5)
| State Lower Limit: | 260,834,524 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 263,089,681 | (Within Confidence Interval) |
| State Upper Limit: | 288,290,790 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 312,800,320 | (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