2010 Confidence Interval Detail
020/Brazoria
020-907/Columbia-Brazoria ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 139,605,726 | 0.9551 | 146,168,701 | 19 | 2,144 | .024519121 |
| A | 129,030,664 | 0.9518 | 135,564,892 | 25 | 1,240 | .005513966 |
| A | 136,397,075 | 0.9518 | 143,304,344 | 15 | 937 | .006234837 |
| A | 138,503,970 | 0.9169 | 151,056,789 | 15 | 598 | .016316614 |
| C | 12,673,050 | 1.0173 | 12,457,535 | 14 | 1,904 | .051124154 |
| C | 11,740,296 | 1.0497 | 11,184,430 | 12 | 1,116 | .034802833 |
| C | 11,639,590 | 0.9687 | 12,015,681 | 10 | 742 | .026392554 |
| C | 12,421,830 | 1.0154 | 12,233,435 | 11 | 343 | .053610572 |
| D3 | 65,022,131 | 0.9560 | 68,014,781 | 20 | 3,553 | .022743367 |
| F1 | 15,860,818 | 0.9850 | 16,102,353 | 11 | 191 | .077874566 |
| F1 | 12,969,240 | 1.0129 | 12,804,068 | 9 | 54 | .013423917 |
| F1 | 15,482,536 | 0.9515 | 16,271,714 | 8 | 26 | .015930575 |
| F1 | 17,301,050 | 1.0038 | 17,235,555 | 5 | 12 | .011147619 |
| Random Totals: | 718,647,976 | 754,414,278 | 174 | 12,860 | ||
| Catg J Exception Values: | 30,807,317 | 31,593,290 | ||||
| Catg D1 Exception Values: | 9,327,423 | 9,421,820 | ||||
| Total Test Values (4): | 758,782,716 | 795,429,388 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 39,771,469 |
Confidence Interval Values (5)
| State Lower Limit: | 755,657,919 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 758,782,716 | (Within Confidence Interval) |
| State Upper Limit: | 835,200,857 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 772,169,592 | (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