2009 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 | 43,906,558 | 0.8509 | 51,600,139 | 17 | 2,858 | .089769908 |
| G1 | 288,017,688 | 0.9516 | 302,666,759 | 15 | 500 | .024678642 |
| G1 | 288,189,631 | 1.0124 | 284,659,849 | 15 | 205 | .004772567 |
| G1 | 286,083,983 | 1.0318 | 277,266,896 | 15 | 121 | .003991203 |
| G1 | 286,698,243 | 1.0074 | 284,592,260 | 15 | 68 | .003243444 |
| Random Totals: | 1,192,896,103 | 1,200,785,903 | 77 | 3,752 | ||
| Catg D1 Exception Values: | 25,314,068 | 38,741,392 | ||||
| Total Test Values (4): | 1,218,210,171 | 1,239,527,295 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 61,976,365 |
Confidence Interval Values (5)
| State Lower Limit: | 1,177,550,930 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 1,218,210,171 | (Within Confidence Interval) |
| State Upper Limit: | 1,301,503,660 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 1,441,615,732 | (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