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Rockwall County
2020 Confidence Interval Detail
Rockwall County
199-902/Royse City ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 237,865,416 | 0.9784 | 243,116,738 | 52 | 1,377 | 0.005279524 |
| A | 379,920,858 | 1.0087 | 376,644,055 | 73 | 1,807 | 0.001831304 |
| A | 456,721,898 | 1.0025 | 455,582,941 | 70 | 1,828 | 0.006655317 |
| A | 431,720,011 | 1.0031 | 430,385,815 | 72 | 1,160 | 0.006463876 |
| E | 104,959,938 | 0.8882 | 118,171,513 | 10 | 500 | 0.026568045 |
| F1 | 35,562,831 | 0.9366 | 37,970,138 | 10 | 113 | 0.015458313 |
| F1 | 40,271,933 | 1.0074 | 39,976,110 | 9 | 40 | 0.024149972 |
| F1 | 30,243,474 | 1.0845 | 27,887,021 | 6 | 14 | 0.047887813 |
| F1 | 29,168,343 | 0.3342 | 87,278,106 | 4 | 6 | 1.331808430 |
| Random Totals: | 1,746,434,702 | 1,817,012,437 | 306 | 6,845 | ||
| CATG D1 EXCEPTION VALUES: | 1,546,296 | 1,404,243 | ||||
| Total Test Values | 1,747,980,998 | 1,818,416,680 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 90,920,834 |
Confidence Interval Values(5)
| Local Test Value: | 1,747,980,998 | WITHIN CONFIDENCE INTERVAL |
|---|---|---|
| State Lower Limit: | 1,727,495,846 | (State Test Value minus Margin of Error Percent) |
| State Upper Limit: | 1,909,337,514 | (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