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 | 0.9743 | 21,575,340 | 14 | 361 | .017192609 |
| A | 21,675,322 | 0.9342 | 23,202,015 | 13 | 226 | .012271184 |
| A | 31,380,866 | 0.8778 | 35,749,449 | 14 | 236 | .039573924 |
| A | 24,438,582 | 0.9823 | 24,878,939 | 13 | 124 | .010774444 |
| D3 | 46,049,272 | 0.9186 | 50,129,841 | 20 | 1,498 | .239292753 |
| Random Totals: | 144,564,896 | 155,535,584 | 74 | 2,445 | ||
| Catg D1 Exception Values: | 3,666,198 | 2,876,879 | ||||
| Total Test Values (4): | 148,231,094 | 158,412,463 |
Margin of Error
| Margin of Error Percent: | 7.4024870 |
|---|---|
| Margin of Error Value: | 11,726,462 |
Confidence Interval Values (5)
| State Lower Limit: | 146,686,001 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 148,231,094 | (Within Confidence Interval) |
| State Upper Limit: | 170,138,925 | (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