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Williamson County
2021 Confidence Interval Detail
Williamson County
246-912/Thrall ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 24,972,117 | 1.1027 | 22,646,338 | 15 | 269 | 0.070792782 |
| A | 19,965,125 | 0.9784 | 20,405,892 | 15 | 123 | 0.023014705 |
| A | 34,931,042 | 1.0323 | 33,838,072 | 15 | 162 | 0.028301910 |
| A | 54,693,645 | 1.0563 | 51,778,515 | 15 | 148 | 0.010564760 |
| E | 202,592,895 | 0.9279 | 218,334,837 | 21 | 1,263 | 0.080330285 |
| Random Totals: | 337,154,824 | 347,003,654 | 81 | 1,965 | ||
| CATG D1 EXCEPTION VALUES: | 15,294,232 | 15,879,560 | ||||
| CATG J EXCEPTION VALUES: | 8,611,477 | 9,042,469 | ||||
| Total Test Values | 361,060,533 | 371,925,683 |
Margin of Error
| Margin of Error Percent: | 7.2937255 |
|---|---|
| Margin of Error Value: | 27,127,238 |
Confidence Interval Values(5)
| Local Test Value: | 361,060,533 | WITHIN CONFIDENCE INTERVAL |
|---|---|---|
| State Lower Limit: | 344,798,445 | (State Test Value minus Margin of Error Percent) |
| State Upper Limit: | 399,052,921 | (State Test Value plus Margin of Error Percent) |
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, D2, E, F1, G1, G2, or L1 marked as exception properties
(5) Unstudied categories and sub-categories were not included in the Confidence Interval Values