2008 Confidence Interval Detail
199/Rockwall
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 | 130,704,139 | 0.9915 | 131,824,649 | 39 | 1,267 | .009179541 |
| A | 148,163,378 | 1.0006 | 148,074,533 | 34 | 1,087 | .004287658 |
| A | 141,026,924 | 1.0389 | 135,746,389 | 24 | 841 | .005105629 |
| A | 144,282,981 | 0.9769 | 147,694,729 | 19 | 576 | .003250357 |
| D3 | 71,821,533 | 0.9642 | 74,488,211 | 21 | 1,101 | .018543756 |
| Random Totals: | 635,998,955 | 637,828,511 | 137 | 4,872 | ||
| Catg J Exception Values: | 37,238,362 | 36,720,125 | ||||
| Catg D1 Exception Values: | 1,996,067 | 2,091,066 | ||||
| Total Test Values (4): | 675,233,384 | 676,639,702 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 33,831,985 |
Confidence Interval Values (5)
| State Lower Limit: | 642,807,717 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 675,233,384 | (Within Confidence Interval) |
| State Upper Limit: | 710,471,687 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 760,997,784 | (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