2010 Confidence Interval Detail
091/Grayson
091-908/Van Alstyne ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 61,290,160 | 1.0122 | 60,551,433 | 19 | 694 | .003345532 |
| A | 63,049,679 | 1.0284 | 61,308,517 | 20 | 445 | .001593529 |
| A | 56,087,761 | 0.9980 | 56,200,161 | 16 | 302 | .001464456 |
| A | 58,801,807 | 0.9726 | 60,458,366 | 17 | 204 | .008220596 |
| D3 | 75,397,675 | 1.0558 | 71,412,839 | 15 | 1,697 | .027198761 |
| F1 | 7,551,328 | 0.6932 | 10,893,433 | 9 | 63 | .371254970 |
| F1 | 8,363,742 | 0.9700 | 8,622,414 | 10 | 23 | .020222197 |
| F1 | 9,115,260 | 0.7461 | 12,217,209 | 6 | 12 | .111935375 |
| F1 | 9,312,765 | 0.9345 | 9,965,506 | 4 | 7 | .001716624 |
| Random Totals: | 348,970,177 | 351,629,878 | 116 | 3,447 | ||
| Catg J Exception Values: | 19,221,686 | 22,556,694 | ||||
| Catg D1 Exception Values: | 3,568,990 | 2,713,734 | ||||
| Total Test Values (4): | 371,760,853 | 376,900,306 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 18,845,015 |
Confidence Interval Values (5)
| State Lower Limit: | 358,055,291 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 371,760,853 | (Within Confidence Interval) |
| State Upper Limit: | 395,745,321 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 378,709,314 | (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