2007 Confidence Interval Detail
199/Rockwall
199-901/Rockwall ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 940,991,259 | 1.0343 | 909,785,612 | 26 | 6,107 | .011335912 |
| A | 940,260,512 | 1.0046 | 935,955,118 | 24 | 4,466 | .007583516 |
| A | 940,322,629 | 0.9747 | 964,730,306 | 23 | 3,209 | .005671729 |
| A | 940,444,265 | 0.9595 | 980,139,932 | 23 | 1,750 | .038992393 |
| D3 | 256,626,724 | 1.0190 | 251,841,731 | 18 | 2,081 | .024530345 |
| F1 | 151,505,734 | 1.0313 | 146,907,528 | 10 | 287 | .031178782 |
| F1 | 151,258,223 | 1.0265 | 147,353,359 | 8 | 89 | .025625820 |
| F1 | 151,480,094 | 1.0077 | 150,322,610 | 7 | 35 | .027724289 |
| F1 | 151,084,359 | 1.0139 | 149,013,077 | 6 | 11 | .014820340 |
| Random Totals: | 4,623,973,799 | 4,636,049,273 | 145 | 18,035 | ||
| Catg D1 Exception Values: | 2,847,440 | 2,579,271 | ||||
| Total Test Values (4): | 4,626,821,239 | 4,638,628,544 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 231,931,427 |
Confidence Interval Values (5)
| State Lower Limit: | 4,406,697,117 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 4,626,821,239 | (Within Confidence Interval) |
| State Upper Limit: | 4,870,559,971 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 5,203,356,036 | (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