2009 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 | 1,073,680,630 | 0.9753 | 1,100,872,173 | 50 | 11,369 | .011507752 |
| A | 873,606,860 | 1.0038 | 870,299,721 | 50 | 7,280 | .014233258 |
| A | 938,115,440 | 1.0015 | 936,710,374 | 50 | 5,797 | .005492325 |
| A | 986,067,290 | 0.9780 | 1,008,248,763 | 49 | 2,508 | .015125195 |
| B | 270,163,030 | 0.9933 | 271,985,332 | 9 | 394 | .003456784 |
| B | 279,285,310 | 0.9874 | 282,849,210 | 6 | 47 | .002405163 |
| B | 359,077,310 | 0.9587 | 374,546,062 | 5 | 24 | .012912188 |
| B | 141,516,480 | 0.9882 | 143,206,315 | 4 | 4 | .000105025 |
| C | 68,698,540 | 0.9941 | 69,106,267 | 7 | 1,241 | .049856485 |
| C | 61,934,370 | 0.9508 | 65,139,220 | 8 | 140 | .010656895 |
| C | 60,557,620 | 0.9044 | 66,958,890 | 6 | 38 | .032841240 |
| C | 33,858,440 | 1.0188 | 33,233,647 | 4 | 8 | .002200269 |
| F1 | 719,814,340 | 0.9300 | 773,993,914 | 8 | 854 | .019098384 |
| F1 | 671,622,210 | 0.8803 | 762,946,961 | 8 | 158 | .027695373 |
| F1 | 715,698,470 | 0.8047 | 889,397,875 | 7 | 43 | .021660086 |
| F1 | 522,657,860 | 0.9444 | 553,428,484 | 6 | 10 | .009757785 |
| L1 | 257,146,070 | 1.1209 | 229,410,358 | 7 | 1,174 | .015810042 |
| L1 | 288,281,790 | 1.0425 | 276,529,295 | 8 | 218 | .006953569 |
| L1 | 263,601,990 | 0.9990 | 263,865,856 | 6 | 70 | .035750632 |
| L1 | 264,410,380 | 1.0499 | 251,843,395 | 6 | 18 | .005550585 |
| Random Totals: | 8,849,794,430 | 9,224,572,112 | 304 | 31,395 | ||
| Catg D1 Exception Values: | 101,786 | 68,598 | ||||
| Total Test Values (4): | 8,849,896,216 | 9,224,640,710 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 461,232,036 |
Confidence Interval Values (5)
| State Lower Limit: | 8,763,408,674 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 8,849,896,216 | (Within Confidence Interval) |
| State Upper Limit: | 9,685,872,746 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 9,163,123,740 | (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