2009 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 | 59,604,583 | 0.9902 | 60,194,489 | 15 | 680 | .030954312 |
| A | 57,870,208 | 1.0031 | 57,691,365 | 17 | 411 | .001942887 |
| A | 57,997,233 | 1.0218 | 56,759,868 | 18 | 318 | .009615536 |
| A | 63,897,228 | 1.0314 | 61,951,937 | 15 | 231 | .027186979 |
| D3 | 72,760,951 | 0.9769 | 74,481,473 | 10 | 1,698 | .006007181 |
| F1 | 6,527,726 | 1.0681 | 6,111,531 | 6 | 60 | .014091702 |
| F1 | 7,738,791 | 0.7978 | 9,700,164 | 5 | 25 | .028274838 |
| F1 | 8,800,072 | 0.7656 | 11,494,347 | 7 | 13 | .175190789 |
| Random Totals: | 335,196,792 | 338,385,174 | 93 | 3,436 | ||
| Catg J Exception Values: | 20,332,060 | 20,571,320 | ||||
| Catg D1 Exception Values: | 3,724,373 | 2,925,236 | ||||
| Catg F1 Exception Values: | 6,719,394 | 8,131,278 | ||||
| Total Test Values (4): | 365,972,619 | 370,013,008 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 18,500,650 |
Confidence Interval Values (5)
| State Lower Limit: | 351,512,358 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 365,972,619 | (Within Confidence Interval) |
| State Upper Limit: | 388,513,658 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 374,157,857 | (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