2007 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 | 662,295,138 | 1.0074 | 657,430,155 | 25 | 6,281 | .049072649 |
| A | 662,489,183 | 1.0089 | 656,645,042 | 25 | 4,059 | .008392896 |
| A | 661,643,566 | 1.0294 | 642,746,810 | 26 | 2,901 | .012372145 |
| A | 662,045,607 | 0.9835 | 673,152,625 | 26 | 1,836 | .003661668 |
| C | 54,768,300 | 0.9893 | 55,360,659 | 12 | 3,055 | .022842465 |
| C | 54,339,236 | 1.0133 | 53,626,010 | 7 | 1,746 | .000567817 |
| C | 54,550,675 | 1.0146 | 53,765,696 | 8 | 1,297 | .008218323 |
| C | 54,476,002 | 1.0827 | 50,314,955 | 8 | 346 | .049764520 |
| D3 | 298,370,437 | 0.9797 | 304,552,860 | 35 | 6,596 | .043522784 |
| F1 | 90,818,727 | 0.8450 | 107,477,783 | 8 | 495 | .201778966 |
| F1 | 90,536,969 | 0.9586 | 94,447,078 | 7 | 148 | .017456499 |
| F1 | 91,925,211 | 0.8644 | 106,345,686 | 6 | 54 | .011221679 |
| F1 | 88,455,266 | 0.9490 | 93,208,921 | 4 | 12 | .008208663 |
| L1 | 50,147,395 | 0.9522 | 52,664,771 | 8 | 543 | .008630559 |
| L1 | 50,552,099 | 0.9837 | 51,389,752 | 7 | 108 | .004625016 |
| L1 | 51,596,241 | 0.9038 | 57,088,118 | 6 | 39 | .052539328 |
| L1 | 48,105,431 | 1.0047 | 47,880,393 | 4 | 12 | .002770537 |
| Random Totals: | 3,727,115,483 | 3,758,097,314 | 222 | 29,528 | ||
| Catg D1 Exception Values: | 12,022,596 | 12,746,378 | ||||
| Total Test Values (4): | 3,739,138,079 | 3,770,843,692 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 188,542,185 |
Confidence Interval Values (5)
| State Lower Limit: | 3,582,301,507 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 3,739,138,079 | (Within Confidence Interval) |
| State Upper Limit: | 3,959,385,877 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 2,816,618,101 | (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