2010 Confidence Interval Detail
020/Brazoria
020-901/Alvin ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 761,189,458 | 0.9361 | 813,149,725 | 27 | 7,543 | .014359497 |
| A | 766,069,273 | 0.9857 | 777,182,990 | 33 | 4,860 | .008022526 |
| A | 792,958,158 | 1.0188 | 778,325,636 | 24 | 3,782 | .007749914 |
| A | 756,588,904 | 0.9912 | 763,305,997 | 17 | 2,404 | .006704535 |
| D3 | 301,572,149 | 1.0085 | 299,030,391 | 16 | 6,708 | .060341941 |
| F1 | 156,742,300 | 1.0079 | 155,513,741 | 10 | 517 | .025690304 |
| F1 | 163,758,098 | 1.0543 | 155,324,005 | 9 | 128 | .007481856 |
| F1 | 165,302,029 | 1.0117 | 163,390,362 | 8 | 35 | .006311124 |
| F1 | 117,569,809 | 0.8929 | 131,671,866 | 4 | 7 | .011774342 |
| L1 | 74,176,880 | 1.0206 | 72,679,679 | 11 | 612 | .006221183 |
| L1 | 65,442,590 | 0.9711 | 67,390,166 | 10 | 106 | .008263695 |
| L1 | 69,483,270 | 0.9855 | 70,505,601 | 9 | 34 | .019073749 |
| L1 | 67,017,750 | 0.9513 | 70,448,597 | 5 | 11 | .002693711 |
| Random Totals: | 4,257,870,668 | 4,317,918,756 | 183 | 26,747 | ||
| Catg J Exception Values: | 85,578,479 | 89,645,763 | ||||
| Catg D1 Exception Values: | 14,086,864 | 14,257,455 | ||||
| Total Test Values (4): | 4,357,536,011 | 4,421,821,974 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 221,091,099 |
Confidence Interval Values (5)
| State Lower Limit: | 4,200,730,875 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 4,357,536,011 | (Within Confidence Interval) |
| State Upper Limit: | 4,642,913,073 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 3,637,836,268 | (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