2007 Confidence Interval Detail
057/Dallas
057-910/Grand Prairie ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 722,928,208 | 0.9808 | 737,080,147 | 21 | 8,493 | .006971835 |
| A | 722,463,709 | 0.9713 | 743,811,087 | 25 | 6,469 | .003152956 |
| A | 722,675,333 | 0.9672 | 747,182,933 | 23 | 5,141 | .002435900 |
| A | 722,564,059 | 0.9834 | 734,761,093 | 24 | 3,598 | .006559201 |
| B | 66,722,702 | 0.9214 | 72,414,480 | 7 | 941 | .026516451 |
| B | 70,990,727 | 0.7668 | 92,580,499 | 7 | 136 | .247657912 |
| B | 66,790,975 | 0.7953 | 83,982,114 | 6 | 10 | .074743454 |
| F1 | 178,328,527 | 0.9023 | 197,637,734 | 7 | 492 | .028027981 |
| F1 | 178,599,390 | 0.8962 | 199,285,193 | 7 | 120 | .021492775 |
| F1 | 179,195,953 | 0.8701 | 205,948,688 | 7 | 37 | .037044622 |
| F1 | 174,048,840 | 0.8224 | 211,635,263 | 5 | 14 | .007666436 |
| L1 | 121,113,421 | 1.1725 | 103,295,029 | 7 | 487 | .026993902 |
| L1 | 123,983,083 | 1.0158 | 122,054,620 | 7 | 59 | .022636674 |
| L1 | 127,120,535 | 1.0365 | 122,644,028 | 6 | 16 | .011900190 |
| Random Totals: | 4,177,525,462 | 4,374,312,908 | 159 | 26,013 | ||
| Catg D1 Exception Values: | 153,248 | 150,995 | ||||
| Catg B Exception Values: | 64,226,550 | 68,356,000 | ||||
| Catg L1 Exception Values: | 118,611,450 | 116,477,774 | ||||
| Total Test Values (4): | 4,360,516,710 | 4,559,297,677 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 227,964,884 |
Confidence Interval Values (5)
| State Lower Limit: | 4,331,332,793 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 4,360,516,710 | (Within Confidence Interval) |
| State Upper Limit: | 4,787,262,561 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 4,531,963,502 | (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