2008 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 | 963,200,510 | 1.0321 | 933,243,397 | 37 | 10,181 | .007168437 |
| A | 971,250,110 | 0.9988 | 972,417,010 | 46 | 8,188 | .001490470 |
| A | 1,032,734,490 | 0.9935 | 1,039,491,183 | 43 | 6,567 | .002317249 |
| A | 1,033,628,930 | 1.0041 | 1,029,408,356 | 45 | 2,696 | .004048082 |
| B | 290,958,840 | 1.0476 | 277,738,488 | 17 | 456 | .017209402 |
| B | 277,179,500 | 0.9539 | 290,575,008 | 6 | 45 | .008048109 |
| B | 258,185,620 | 0.9277 | 278,307,233 | 5 | 24 | .007699916 |
| B | 312,602,540 | 1.0222 | 305,813,481 | 4 | 9 | .000217896 |
| F1 | 706,386,100 | 0.8413 | 839,636,396 | 15 | 879 | .045813620 |
| F1 | 760,616,370 | 0.9082 | 837,498,756 | 11 | 178 | .021317851 |
| F1 | 635,575,980 | 0.9150 | 694,618,557 | 7 | 39 | .008486385 |
| F1 | 804,290,960 | 0.9242 | 870,256,395 | 5 | 15 | .001461257 |
| L1 | 269,749,320 | 1.0634 | 253,666,842 | 7 | 1,225 | .065975966 |
| L1 | 263,923,940 | 1.0300 | 256,236,835 | 7 | 204 | .079496893 |
| L1 | 296,872,160 | 1.0742 | 276,365,816 | 6 | 79 | .002655076 |
| L1 | 247,750,910 | 1.1150 | 222,198,126 | 5 | 16 | .012174616 |
| Random Totals: | 9,124,906,280 | 9,377,471,879 | 266 | 30,801 | ||
| Catg D1 Exception Values: | 83,860 | 61,052 | ||||
| Total Test Values (4): | 9,124,990,140 | 9,377,532,931 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 468,876,647 |
Confidence Interval Values (5)
| State Lower Limit: | 8,908,656,284 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 9,124,990,140 | (Within Confidence Interval) |
| State Upper Limit: | 9,846,409,578 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 9,504,743,537 | (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