2006 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 | 543,758,638 | 0.9928 | 547,702,093 | 39 | 5,651 | .004483634 |
| A | 543,208,229 | 0.9708 | 559,547,001 | 39 | 3,664 | .013000622 |
| A | 543,515,910 | 0.9918 | 548,009,589 | 45 | 2,610 | .002037554 |
| A | 543,107,637 | 0.9786 | 554,984,301 | 46 | 1,652 | .005273465 |
| C | 46,249,945 | 0.9365 | 49,385,953 | 10 | 3,054 | .032162762 |
| C | 43,177,220 | 0.9026 | 47,836,495 | 7 | 1,526 | .061414888 |
| C | 44,741,612 | 0.8710 | 51,368,096 | 7 | 1,219 | .061562253 |
| C | 44,599,223 | 0.9932 | 44,904,574 | 8 | 494 | .000560601 |
| D3 | 263,405,880 | 0.9188 | 286,684,676 | 23 | 6,539 | .160833066 |
| F1 | 74,067,840 | 0.9594 | 77,202,251 | 9 | 479 | .033233772 |
| F1 | 74,652,982 | 1.0123 | 73,745,907 | 10 | 159 | .032924893 |
| F1 | 74,380,831 | 0.9844 | 75,559,560 | 9 | 59 | .009955880 |
| F1 | 72,885,209 | 1.0156 | 71,765,665 | 10 | 13 | .004531538 |
| L1 | 43,311,341 | 0.9731 | 44,508,623 | 9 | 549 | .011801009 |
| L1 | 42,836,108 | 0.9894 | 43,295,035 | 9 | 111 | .019750406 |
| L1 | 43,122,905 | 0.9954 | 43,322,187 | 8 | 35 | .009040729 |
| L1 | 42,414,113 | 1.0055 | 42,182,111 | 6 | 11 | .001627463 |
| Random Totals: | 3,083,435,623 | 3,162,004,117 | 294 | 27,825 | ||
| Catg D1 Exception Values: | 12,082,160 | 12,979,807 | ||||
| Total Test Values (4): | 3,095,517,783 | 3,174,983,924 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 158,749,196 |
Confidence Interval Values (5)
| State Lower Limit: | 3,016,234,728 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 3,095,517,783 | (Within Confidence Interval) |
| State Upper Limit: | 3,333,733,120 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 3,116,471,681 | (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