2008 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 | 130,400,413 | 1.0323 | 126,320,268 | 17 | 2,073 | .024704321 |
| A | 134,203,089 | 0.9807 | 136,844,182 | 20 | 1,333 | .001044661 |
| A | 135,533,840 | 0.9951 | 136,201,226 | 20 | 939 | .000956842 |
| A | 141,225,887 | 0.9888 | 142,825,533 | 20 | 599 | .004932093 |
| C | 6,242,350 | 0.7281 | 8,573,479 | 7 | 1,177 | .331252482 |
| C | 18,205,500 | 1.0636 | 17,116,867 | 15 | 2,044 | .043037883 |
| C | 11,566,370 | 1.1265 | 10,267,528 | 8 | 731 | .036623978 |
| C | 11,563,500 | 1.0344 | 11,178,944 | 10 | 323 | .043362229 |
| D3 | 65,783,371 | 0.9803 | 67,105,346 | 13 | 3,513 | .001517731 |
| F1 | 12,992,343 | 0.9105 | 14,269,460 | 8 | 180 | .025648669 |
| F1 | 13,346,811 | 0.8088 | 16,501,992 | 8 | 73 | .031049387 |
| F1 | 12,701,806 | 0.9158 | 13,869,629 | 6 | 25 | .007550551 |
| F1 | 15,719,990 | 0.8378 | 18,763,416 | 4 | 12 | .005008552 |
| Random Totals: | 709,485,270 | 719,837,870 | 156 | 13,022 | ||
| Catg J Exception Values: | 31,190,933 | 31,342,826 | ||||
| Catg D1 Exception Values: | 8,880,339 | 9,804,748 | ||||
| Total Test Values (4): | 749,556,542 | 760,985,444 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 38,049,272 |
Confidence Interval Values (5)
| State Lower Limit: | 722,936,172 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 749,556,542 | (Within Confidence Interval) |
| State Upper Limit: | 799,034,716 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 805,711,126 | (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