2007 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 | 15,466,997 | 0.9984 | 15,491,784 | 10 | 275 | .008720401 |
| A | 15,432,662 | 0.9754 | 15,821,880 | 9 | 180 | .003495756 |
| A | 15,502,184 | 1.0292 | 15,062,363 | 10 | 127 | .017355681 |
| A | 15,274,741 | 0.9648 | 15,832,028 | 8 | 73 | .019004462 |
| D3 | 36,624,312 | 0.8948 | 40,930,165 | 21 | 1,166 | .108890835 |
| Random Totals: | 98,300,896 | 103,138,220 | 58 | 1,821 | ||
| Catg D1 Exception Values: | 4,204,136 | 3,123,638 | ||||
| Total Test Values (4): | 102,505,032 | 106,261,858 |
Margin of Error
| Margin of Error Percent: | 5.8819967 |
|---|---|
| Margin of Error Value: | 6,250,319 |
Confidence Interval Values (5)
| State Lower Limit: | 100,011,539 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 102,505,032 | (Within Confidence Interval) |
| State Upper Limit: | 112,512,177 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 113,861,260 | (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