2007 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 | 58,211,729 | 0.9379 | 62,066,029 | 9 | 717 | .028930434 |
| A | 58,231,278 | 0.9956 | 58,488,628 | 12 | 417 | .003140052 |
| A | 58,316,308 | 1.0287 | 56,689,324 | 9 | 309 | .004288973 |
| A | 58,065,954 | 0.9984 | 58,159,008 | 11 | 204 | .000931854 |
| D3 | 72,765,599 | 0.9446 | 77,033,241 | 24 | 1,937 | .037389272 |
| F1 | 6,855,340 | 0.7412 | 9,248,975 | 9 | 62 | .165049361 |
| F1 | 6,882,516 | 0.7869 | 8,746,367 | 9 | 20 | .044610415 |
| F1 | 6,731,372 | 0.8987 | 7,490,121 | 4 | 9 | .057562015 |
| Random Totals: | 326,060,096 | 337,921,693 | 87 | 3,675 | ||
| Catg D1 Exception Values: | 4,829,935 | 3,483,486 | ||||
| Catg F1 Exception Values: | 9,140,125 | 11,709,063 | ||||
| Total Test Values (4): | 340,030,156 | 353,114,242 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 17,655,712 |
Confidence Interval Values (5)
| State Lower Limit: | 335,458,530 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 340,030,156 | (Within Confidence Interval) |
| State Upper Limit: | 370,769,954 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 352,010,001 | (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