2009 Confidence Interval Detail
220/Tarrant
220-905/Fort Worth ISD
Category Summary
| (1) Category |
(1) Local Value |
(1) Stratum Ratio |
(1) State Value |
(2) Sample Size |
(3) Total Parcels |
Stratum Variance |
|---|---|---|---|---|---|---|
| A | 3,216,348,816 | 1.0118 | 3,178,838,521 | 44 | 47,413 | .031879181 |
| A | 3,345,916,447 | 1.0183 | 3,285,786,553 | 51 | 27,556 | .006842509 |
| A | 3,528,373,433 | 0.9924 | 3,555,394,431 | 54 | 15,501 | .002828819 |
| A | 3,880,963,517 | 1.0081 | 3,849,780,297 | 47 | 5,923 | .003499051 |
| B | 464,250,736 | 1.0311 | 450,248,023 | 12 | 3,743 | .011759273 |
| B | 486,320,051 | 0.9903 | 491,083,562 | 8 | 296 | .000674284 |
| B | 399,781,297 | 0.9383 | 426,069,804 | 6 | 57 | .011908183 |
| B | 374,450,141 | 0.9581 | 390,825,739 | 5 | 18 | .005819627 |
| C | 120,213,591 | 0.9512 | 126,380,983 | 7 | 6,973 | .014869551 |
| C | 113,028,371 | 0.8796 | 128,499,740 | 8 | 1,093 | .013425748 |
| C | 109,406,223 | 1.0991 | 99,541,646 | 7 | 324 | .010808160 |
| C | 108,627,938 | 0.9823 | 110,585,298 | 6 | 92 | .001399518 |
| F1 | 1,568,794,717 | 0.8673 | 1,808,825,916 | 8 | 3,994 | .018871110 |
| F1 | 1,547,787,559 | 0.8893 | 1,740,456,043 | 9 | 784 | .003850580 |
| F1 | 1,452,016,936 | 0.9678 | 1,500,327,481 | 7 | 194 | .007489118 |
| F1 | 1,706,619,573 | 0.9072 | 1,881,194,415 | 6 | 45 | .014184893 |
| G1 | 163,865,365 | 1.0079 | 162,580,975 | 7 | 104 | .003345111 |
| G1 | 162,467,435 | 0.9757 | 166,513,718 | 6 | 49 | .002349294 |
| G1 | 165,324,918 | 0.9968 | 165,855,656 | 6 | 32 | .000534835 |
| G1 | 158,582,251 | 1.0140 | 156,392,752 | 5 | 21 | .000065653 |
| L1 | 821,419,102 | 1.1422 | 719,155,229 | 7 | 3,242 | .069644397 |
| L1 | 788,084,651 | 1.0839 | 727,082,435 | 7 | 430 | .002854804 |
| L1 | 811,780,717 | 1.0467 | 775,561,973 | 7 | 123 | .007516333 |
| L1 | 737,808,099 | 1.0528 | 700,805,565 | 5 | 25 | .004270849 |
| Random Totals: | 26,232,231,884 | 26,597,786,755 | 335 | 118,032 | ||
| Catg D1 Exception Values: | 1,349,504 | 1,209,434 | ||||
| Total Test Values (4): | 26,233,581,388 | 26,598,996,189 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 1,329,949,809 |
Confidence Interval Values (5)
| State Lower Limit: | 25,269,046,380 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 26,233,581,388 | (Within Confidence Interval) |
| State Upper Limit: | 27,928,945,998 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 25,491,845,650 | (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