2009 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 | 17,402,046 | 0.8948 | 19,447,973 | 7 | 296 | .036487421 |
| A | 16,341,225 | 1.0414 | 15,691,593 | 11 | 178 | .014919481 |
| A | 13,118,889 | 0.9479 | 13,839,950 | 8 | 108 | .006040866 |
| A | 15,112,008 | 1.0011 | 15,095,403 | 6 | 79 | .024005153 |
| D3 | 39,246,687 | 0.9310 | 42,155,410 | 18 | 1,172 | .110425656 |
| Random Totals: | 101,220,855 | 106,230,329 | 50 | 1,833 | ||
| Catg D1 Exception Values: | 3,739,836 | 2,992,795 | ||||
| Total Test Values (4): | 104,960,691 | 109,223,124 |
Margin of Error
| Margin of Error Percent: | 6.8730125 |
|---|---|
| Margin of Error Value: | 7,506,919 |
Confidence Interval Values (5)
| State Lower Limit: | 101,716,205 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 104,960,691 | (Within Confidence Interval) |
| State Upper Limit: | 116,730,043 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 119,703,632 | (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