2009 Confidence Interval Detail
091/Grayson
091-918/Tom Bean ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 21,020,854 | 0.9403 | 22,355,476 | 14 | 361 | .020709951 |
| A | 21,675,322 | 0.8918 | 24,305,138 | 14 | 226 | .015285057 |
| A | 31,380,866 | 0.8561 | 36,655,608 | 14 | 236 | .031542144 |
| A | 24,438,582 | 0.9596 | 25,467,468 | 13 | 124 | .011272561 |
| D3 | 46,049,272 | 0.9139 | 50,387,649 | 20 | 1,498 | .241568643 |
| Random Totals: | 144,564,896 | 159,171,339 | 75 | 2,445 | ||
| Catg D1 Exception Values: | 3,666,198 | 2,876,879 | ||||
| Total Test Values (4): | 148,231,094 | 162,048,218 |
Margin of Error
| Margin of Error Percent: | 7.2573486 |
|---|---|
| Margin of Error Value: | 11,760,404 |
Confidence Interval Values (5)
| Local Test Value: | 148,231,094 | (Outside Confidence Interval) |
|---|---|---|
| State Lower Limit: | 150,287,814 | (State Test Value minus Margin of Error Percent) |
| State Upper Limit: | 173,808,622 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 145,080,152 | (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