2006 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 | 736,018,486 | 0.9933 | 740,983,073 | 48 | 4,034 | .001216315 |
| A | 735,765,310 | 0.9696 | 758,833,859 | 47 | 2,850 | .007105422 |
| A | 735,805,058 | 0.9862 | 746,101,255 | 50 | 2,227 | .001111319 |
| A | 735,847,330 | 0.9753 | 754,483,062 | 49 | 1,450 | .001143403 |
| F1 | 458,032,189 | 0.8028 | 570,543,335 | 12 | 151 | .085321070 |
| F1 | 465,066,596 | 0.9027 | 515,195,077 | 11 | 61 | .008193600 |
| F1 | 467,671,747 | 0.9066 | 515,852,357 | 10 | 35 | .004843572 |
| F1 | 440,558,451 | 0.9662 | 455,970,245 | 8 | 17 | .003609465 |
| L1 | 367,584,944 | 1.0194 | 360,589,508 | 7 | 276 | .012313854 |
| L1 | 365,412,391 | 1.0497 | 348,111,261 | 6 | 61 | .011903057 |
| L1 | 371,083,541 | 1.0808 | 343,341,544 | 7 | 24 | .008498542 |
| Random Totals: | 5,878,846,043 | 6,110,004,576 | 255 | 11,186 | ||
| Catg D1 Exception Values: | 171,137 | 166,889 | ||||
| Catg L1 Exception Values: | 308,304,595 | 298,386,453 | ||||
| Total Test Values (4): | 6,187,321,775 | 6,408,557,918 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 320,427,896 |
Confidence Interval Values (5)
| State Lower Limit: | 6,088,130,022 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 6,187,321,775 | (Within Confidence Interval) |
| State Upper Limit: | 6,728,985,814 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 6,499,340,850 | (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