2007 Confidence Interval Detail
240/Webb
240-904/Webb CISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| D3 | 29,896,659 | 0.8637 | 34,614,634 | 12 | 2,469 | .046013024 |
| G1 | 323,639,121 | 1.1183 | 289,402,773 | 10 | 523 | .253666271 |
| G1 | 322,446,256 | 1.1661 | 276,516,813 | 10 | 223 | .039952421 |
| G1 | 323,057,687 | 0.9733 | 331,919,950 | 9 | 135 | .006801902 |
| G1 | 322,287,229 | 0.8910 | 361,714,062 | 9 | 61 | .124839256 |
| Random Totals: | 1,321,326,952 | 1,294,168,232 | 50 | 3,411 | ||
| Catg D1 Exception Values: | 24,052,909 | 39,952,077 | ||||
| Total Test Values (4): | 1,345,379,861 | 1,334,120,309 |
Margin of Error
| Margin of Error Percent: | 9.5349738 |
|---|---|
| Margin of Error Value: | 127,208,022 |
Confidence Interval Values (5)
| State Lower Limit: | 1,206,912,287 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 1,345,379,861 | (Within Confidence Interval) |
| State Upper Limit: | 1,461,328,331 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 1,549,774,108 | (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