2006 Confidence Interval Detail
057/Dallas
057-912/Irving ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 933,496,311 | 1.0211 | 914,206,553 | 48 | 9,807 | .002468057 |
| A | 933,340,035 | 1.0173 | 917,467,841 | 47 | 7,879 | .003264073 |
| A | 932,962,609 | 1.0151 | 919,084,434 | 49 | 6,158 | .002150032 |
| A | 933,181,101 | 0.9827 | 949,609,343 | 49 | 2,865 | .004793921 |
| B | 244,899,101 | 1.0003 | 244,825,653 | 21 | 522 | .000400825 |
| B | 243,698,435 | 0.9915 | 245,787,630 | 7 | 50 | .005660436 |
| B | 250,235,924 | 0.9310 | 268,781,873 | 6 | 27 | .042313219 |
| B | 232,526,005 | 0.9574 | 242,872,368 | 7 | 11 | .029737478 |
| F1 | 599,166,449 | 1.0031 | 597,314,773 | 14 | 841 | .013436604 |
| F1 | 598,982,386 | 0.9917 | 603,995,549 | 9 | 178 | .002973126 |
| F1 | 603,935,379 | 1.0133 | 596,008,466 | 8 | 56 | .013726996 |
| F1 | 588,413,719 | 1.0129 | 580,919,853 | 7 | 14 | .000376853 |
| L1 | 249,710,825 | 1.1086 | 225,248,805 | 7 | 1,221 | .005220151 |
| L1 | 250,334,791 | 1.0800 | 231,791,473 | 7 | 216 | .012813916 |
| L1 | 250,876,110 | 1.1409 | 219,893,163 | 8 | 74 | .014171813 |
| L1 | 247,461,976 | 1.0953 | 225,930,773 | 7 | 18 | .009133834 |
| Random Totals: | 8,093,221,156 | 7,983,738,550 | 301 | 29,937 | ||
| Catg D1 Exception Values: | 108,044 | 85,129 | ||||
| Total Test Values (4): | 8,093,329,200 | 7,983,823,679 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 399,191,184 |
Confidence Interval Values (5)
| State Lower Limit: | 7,584,632,495 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 8,093,329,200 | (Within Confidence Interval) |
| State Upper Limit: | 8,383,014,863 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 8,621,913,824 | (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