2008 Confidence Interval Detail
091/Grayson
091-901/Bells ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 16,617,489 | 0.8708 | 19,083,014 | 7 | 332 | .036326166 |
| A | 17,738,953 | 0.8344 | 21,259,531 | 7 | 188 | .158033872 |
| A | 19,020,507 | 1.0171 | 18,700,725 | 6 | 141 | .004709385 |
| A | 18,482,294 | 1.0064 | 18,364,760 | 8 | 89 | .012028025 |
| D3 | 48,706,494 | 0.9550 | 51,001,564 | 23 | 1,668 | .019417949 |
| Random Totals: | 120,565,737 | 128,409,594 | 51 | 2,418 | ||
| Catg J Exception Values: | 5,799,994 | 5,959,625 | ||||
| Catg D1 Exception Values: | 3,517,509 | 2,270,718 | ||||
| Total Test Values (4): | 129,883,240 | 136,639,937 |
Margin of Error
| Margin of Error Percent: | 5.6136823 |
|---|---|
| Margin of Error Value: | 7,670,532 |
Confidence Interval Values (5)
| State Lower Limit: | 128,969,405 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 129,883,240 | (Within Confidence Interval) |
| State Upper Limit: | 144,310,469 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 128,215,222 | (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