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 | 723,022,370 | 0.9808 | 737,176,152 | 21 | 8,493 | .006971835 |
| A | 722,557,811 | 0.9713 | 743,907,970 | 25 | 6,469 | .003152956 |
| A | 722,769,463 | 0.9672 | 747,280,255 | 23 | 5,141 | .002435900 |
| A | 722,658,174 | 0.9834 | 734,856,797 | 24 | 3,598 | .006559201 |
| B | 67,946,432 | 0.9214 | 73,742,600 | 7 | 941 | .026516451 |
| B | 72,292,735 | 0.7668 | 94,278,475 | 7 | 136 | .247657912 |
| B | 68,015,957 | 0.7953 | 85,522,390 | 6 | 10 | .074743454 |
| F1 | 180,939,410 | 0.9023 | 200,531,320 | 7 | 492 | .028027981 |
| F1 | 181,214,239 | 0.8962 | 202,202,900 | 7 | 120 | .021492775 |
| F1 | 181,819,536 | 0.8701 | 208,963,954 | 7 | 37 | .037044622 |
| F1 | 176,597,064 | 0.8224 | 214,733,784 | 5 | 14 | .007666436 |
| L1 | 120,810,031 | 1.1725 | 103,036,274 | 7 | 487 | .026993902 |
| L1 | 123,672,505 | 1.0158 | 121,748,873 | 7 | 59 | .022636674 |
| L1 | 126,802,097 | 1.0365 | 122,336,804 | 6 | 16 | .011900190 |
| Random Totals: | 4,191,117,824 | 4,390,318,548 | 159 | 26,013 | ||
| Catg D1 Exception Values: | 153,248 | 151,260 | ||||
| Catg B Exception Values: | 64,226,550 | 68,356,000 | ||||
| Catg L1 Exception Values: | 118,611,450 | 116,477,774 | ||||
| Total Test Values (4): | 4,374,109,072 | 4,575,303,582 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 228,765,179 |
Confidence Interval Values (5)
| State Lower Limit: | 4,346,538,403 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 4,374,109,072 | (Within Confidence Interval) |
| State Upper Limit: | 4,804,068,761 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 4,719,831,619 | (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