2011 Confidence Interval Detail
220/Tarrant
220-906/Grapevine-Colleyville ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 1,299,429,543 | 0.9593 | 1,354,560,141 | 50 | 7,273 | .017485127 |
| A | 1,346,254,016 | 0.9767 | 1,378,370,038 | 50 | 4,999 | .006449151 |
| A | 1,393,326,950 | 0.9769 | 1,426,273,877 | 50 | 3,641 | .007398798 |
| A | 1,302,402,095 | 0.9725 | 1,339,230,946 | 50 | 1,837 | .007706794 |
| B | 139,876,836 | 1.0223 | 136,825,625 | 10 | 725 | .006893452 |
| B | 126,628,012 | 0.8610 | 147,070,862 | 6 | 13 | .008041376 |
| B | 96,435,953 | 0.9147 | 105,429,051 | 4 | 5 | .014490376 |
| B | 318,763,709 | 0.9436 | 337,816,563 | 3 | 10 | .001359340 |
| F1 | 587,002,811 | 0.9915 | 592,035,109 | 10 | 571 | .015233434 |
| F1 | 531,471,194 | 0.8939 | 594,553,299 | 9 | 152 | .015188224 |
| F1 | 655,403,142 | 0.8816 | 743,424,617 | 8 | 58 | .011335961 |
| F1 | 564,719,629 | 0.8875 | 636,303,807 | 2 | 3 | .026182384 |
| L1 | 518,931,545 | 1.0493 | 494,550,219 | 10 | 656 | .001898681 |
| L1 | 539,186,002 | 0.9768 | 551,992,222 | 8 | 31 | .002879021 |
| L1 | 455,116,495 | 1.0074 | 451,773,372 | 4 | 6 | .000597418 |
| Random Totals: | 9,874,947,932 | 10,290,209,748 | 274 | 19,980 | ||
| Catg D1 Exception Values: | 92,132 | 63,517 | ||||
| Catg L1 Exception Values: | 390,857,857 | 391,566,003 | ||||
| Total Test Values (4): | 10,265,897,921 | 10,681,839,268 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 534,091,963 |
Confidence Interval Values (5)
| State Lower Limit: | 10,147,747,305 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 10,265,897,921 | (Within Confidence Interval) |
| State Upper Limit: | 11,215,931,231 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 9,832,933,437 | (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