2008 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 | 647,993,702 | 1.0060 | 644,128,928 | 40 | 6,712 | .003598175 |
| A | 717,829,926 | 0.9992 | 718,404,650 | 46 | 4,738 | .003360727 |
| A | 787,515,489 | 0.9981 | 789,014,617 | 49 | 3,816 | .002814208 |
| A | 801,897,282 | 1.0250 | 782,338,812 | 49 | 2,525 | .010562198 |
| C | 47,250,455 | 0.9631 | 49,060,798 | 12 | 2,649 | .028111949 |
| C | 40,240,775 | 1.0330 | 38,955,252 | 19 | 1,267 | .013963497 |
| C | 61,394,721 | 0.9860 | 62,266,451 | 13 | 600 | .004274606 |
| C | 86,809,790 | 0.9552 | 90,881,271 | 5 | 24 | .030352064 |
| D3 | 307,641,905 | 0.8805 | 349,394,554 | 40 | 6,707 | .444445823 |
| F1 | 93,182,564 | 0.7188 | 129,636,288 | 14 | 501 | .211920065 |
| F1 | 95,968,581 | 0.8820 | 108,807,915 | 10 | 162 | .116749098 |
| F1 | 105,242,665 | 0.8565 | 122,875,266 | 6 | 63 | .023645746 |
| F1 | 148,563,410 | 0.9823 | 151,240,364 | 5 | 18 | .007322981 |
| Random Totals: | 3,941,531,265 | 4,037,005,166 | 308 | 29,782 | ||
| Catg D1 Exception Values: | 12,285,390 | 13,552,165 | ||||
| Total Test Values (4): | 3,953,816,655 | 4,050,557,331 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 202,527,867 |
Confidence Interval Values (5)
| State Lower Limit: | 3,848,029,464 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 3,953,816,655 | (Within Confidence Interval) |
| State Upper Limit: | 4,253,085,198 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 2,883,532,038 | (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