2007 Confidence Interval Detail
246/Williamson
246-914/Coupland ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 3,766,027 | 0.9932 | 3,791,811 | 8 | 59 | .013061573 |
| A | 3,787,485 | 0.9424 | 4,018,978 | 8 | 40 | .012134914 |
| A | 3,730,251 | 0.9611 | 3,881,231 | 7 | 28 | .006325196 |
| A | 3,740,516 | 0.9644 | 3,878,594 | 7 | 18 | .002587699 |
| D3 | 21,387,423 | 0.9763 | 21,906,610 | 26 | 771 | .087147618 |
| Random Totals: | 36,411,702 | 37,477,224 | 56 | 916 | ||
| Catg J Exception Values: | 4,719,186 | 4,672,230 | ||||
| Catg D1 Exception Values: | 4,551,398 | 4,555,560 | ||||
| Total Test Values (4): | 45,682,286 | 46,705,014 |
Margin of Error
| Margin of Error Percent: | 5.4432828 |
|---|---|
| Margin of Error Value: | 2,542,286 |
Confidence Interval Values (5)
| State Lower Limit: | 44,162,728 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 45,682,286 | (Within Confidence Interval) |
| State Upper Limit: | 49,247,300 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 46,618,256 | (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