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Williamson County
2020 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 | 23,136,710 | 0.9979 | 23,185,399 | 17 | 263 | 0.180532672 |
| A | 28,710,140 | 0.9769 | 29,389,027 | 16 | 181 | 0.030692282 |
| A | 28,472,342 | 1.0077 | 28,254,780 | 18 | 125 | 0.014105329 |
| A | 23,333,198 | 0.9355 | 24,941,954 | 19 | 64 | 0.045605381 |
| E | 157,831,502 | 0.9033 | 174,727,667 | 25 | 1,219 | 0.028911414 |
| Random Totals: | 261,483,892 | 280,498,827 | 95 | 1,852 | ||
| CATG D1 EXCEPTION VALUES: | 12,251,031 | 17,562,644 | ||||
| CATG J EXCEPTION VALUES: | 11,895,324 | 13,096,761 | ||||
| Total Test Values | 285,630,247 | 311,158,232 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 15,557,912 |
Confidence Interval Values(5)
| Local Test Value: | 285,630,247 | OUTSIDE CONFIDENCE INTERVAL |
|---|---|---|
| State Lower Limit: | 295,600,320 | (State Test Value minus Margin of Error Percent) |
| State Upper Limit: | 326,716,144 | (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