2009 Confidence Interval Detail
057/Dallas
057-922/Coppell ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 825,439,300 | 0.9731 | 848,257,425 | 49 | 4,307 | .004062780 |
| A | 825,716,850 | 0.9557 | 863,991,681 | 50 | 3,014 | .006266828 |
| A | 829,118,380 | 0.9516 | 871,288,756 | 50 | 2,384 | .004961883 |
| A | 830,564,150 | 0.9664 | 859,441,380 | 50 | 1,551 | .003094791 |
| F1 | 659,274,730 | 0.9336 | 706,164,021 | 9 | 187 | .004055390 |
| F1 | 581,700,360 | 0.9010 | 645,616,382 | 8 | 65 | .002564233 |
| F1 | 597,196,080 | 0.8991 | 664,215,415 | 7 | 38 | .005846712 |
| F1 | 399,193,120 | 0.9088 | 439,252,993 | 6 | 12 | .002378629 |
| L1 | 348,384,180 | 1.0650 | 327,121,296 | 7 | 269 | .009083363 |
| L1 | 430,089,160 | 1.0424 | 412,595,127 | 6 | 77 | .003522693 |
| L1 | 411,238,060 | 0.9649 | 426,197,596 | 5 | 25 | .012804739 |
| L1 | 401,898,730 | 0.9760 | 411,781,486 | 4 | 11 | .029983209 |
| Random Totals: | 7,139,813,100 | 7,475,923,558 | 251 | 11,940 | ||
| Catg D1 Exception Values: | 218,299 | 170,504 | ||||
| Total Test Values (4): | 7,140,031,399 | 7,476,094,062 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 373,804,703 |
Confidence Interval Values (5)
| State Lower Limit: | 7,102,289,359 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 7,140,031,399 | (Within Confidence Interval) |
| State Upper Limit: | 7,849,898,765 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 7,560,216,622 | (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