2008 Confidence Interval Detail
091/Grayson
091-902/Collinsville ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 15,567,088 | 0.9289 | 16,758,626 | 7 | 276 | .043201424 |
| A | 12,709,027 | 1.0004 | 12,703,945 | 8 | 146 | .003084089 |
| A | 22,007,001 | 1.0148 | 21,686,047 | 7 | 190 | .015558358 |
| A | 16,035,178 | 1.0432 | 15,371,145 | 7 | 81 | .000672522 |
| D3 | 38,586,523 | 0.9794 | 39,398,124 | 14 | 1,147 | .012688109 |
| Random Totals: | 104,904,817 | 105,917,887 | 43 | 1,840 | ||
| Catg D1 Exception Values: | 4,116,166 | 3,098,444 | ||||
| Total Test Values (4): | 109,020,983 | 109,016,331 |
Margin of Error
| Margin of Error Percent: | 5.0000004 |
|---|---|
| Margin of Error Value: | 5,450,817 |
Confidence Interval Values (5)
| State Lower Limit: | 103,565,514 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 109,020,983 | (Within Confidence Interval) |
| State Upper Limit: | 114,467,148 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 120,092,213 | (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