2007 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 | 977,373,807 | 0.9958 | 981,496,091 | 49 | 10,042 | .001521902 |
| A | 977,038,283 | 0.9984 | 978,604,049 | 49 | 8,056 | .001136475 |
| A | 977,183,512 | 0.9660 | 1,011,577,135 | 47 | 6,176 | .030994368 |
| A | 977,104,060 | 0.9844 | 992,588,440 | 47 | 2,686 | .007569978 |
| B | 282,803,226 | 0.8198 | 344,966,121 | 11 | 526 | .066801166 |
| B | 282,329,409 | 0.9558 | 295,385,446 | 6 | 49 | .023748739 |
| B | 289,564,996 | 0.9087 | 318,658,519 | 6 | 26 | .004623853 |
| B | 266,244,648 | 1.0189 | 261,305,965 | 5 | 8 | .007843733 |
| F1 | 700,475,081 | 0.8266 | 847,417,228 | 11 | 848 | .074802253 |
| F1 | 698,802,618 | 0.8707 | 802,575,649 | 7 | 176 | .014485321 |
| F1 | 723,814,966 | 0.8217 | 880,874,974 | 6 | 54 | .049922371 |
| F1 | 674,024,971 | 0.9535 | 706,895,617 | 5 | 13 | .005960691 |
| L1 | 260,288,264 | 1.1720 | 222,088,962 | 7 | 1,159 | .047453303 |
| L1 | 262,626,076 | 1.0955 | 239,731,699 | 7 | 201 | .005494144 |
| L1 | 265,784,620 | 1.1257 | 236,106,085 | 7 | 68 | .003745140 |
| L1 | 252,343,582 | 1.0763 | 234,454,689 | 6 | 15 | .009253122 |
| Random Totals: | 8,867,802,119 | 9,354,726,669 | 276 | 30,103 | ||
| Catg D1 Exception Values: | 89,890 | 68,797 | ||||
| Total Test Values (4): | 8,867,892,009 | 9,354,795,466 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 467,739,773 |
Confidence Interval Values (5)
| Local Test Value: | 8,867,892,009 | (Outside Confidence Interval) |
|---|---|---|
| State Lower Limit: | 8,887,055,693 | (State Test Value minus Margin of Error Percent) |
| State Upper Limit: | 9,822,535,239 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 9,478,955,049 | (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