2008 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 | 57,420,450 | 1.0604 | 54,149,802 | 8 | 692 | .054434780 |
| A | 60,767,199 | 0.9259 | 65,630,413 | 10 | 441 | .029908214 |
| A | 59,664,874 | 0.8827 | 67,593,604 | 7 | 333 | .015798516 |
| A | 62,791,808 | 1.0358 | 60,621,556 | 11 | 229 | .019432950 |
| D3 | 65,744,276 | 0.9864 | 66,650,726 | 18 | 1,688 | .001332816 |
| F1 | 6,907,010 | 0.9391 | 7,354,925 | 7 | 63 | .017288664 |
| F1 | 8,164,389 | 0.7760 | 10,521,120 | 6 | 25 | .066134170 |
| F1 | 7,387,171 | 0.7868 | 9,388,880 | 4 | 10 | .040549804 |
| Random Totals: | 328,847,177 | 341,911,026 | 71 | 3,481 | ||
| Catg D1 Exception Values: | 4,092,521 | 2,929,522 | ||||
| Catg F1 Exception Values: | 4,536,418 | 5,531,252 | ||||
| Total Test Values (4): | 337,476,116 | 350,371,800 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 17,518,590 |
Confidence Interval Values (5)
| State Lower Limit: | 332,853,210 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 337,476,116 | (Within Confidence Interval) |
| State Upper Limit: | 367,890,390 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 355,874,843 | (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