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220/Tarrant
2017 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 | 1,673,980,724 | 0.9579 | 1,747,552,692 | 152 | 6,585 | .009888750 |
| A | 2,041,222,984 | 0.9516 | 2,145,043,069 | 158 | 5,764 | .009225298 |
| A | 2,215,440,918 | 0.9793 | 2,262,269,905 | 139 | 4,525 | .006431797 |
| A | 2,106,634,050 | 0.9935 | 2,120,416,759 | 101 | 2,499 | .008643717 |
| B | 292,653,202 | 0.9939 | 294,449,343 | 30 | 632 | .008811369 |
| B | 239,720,000 | 0.9871 | 242,852,801 | 7 | 9 | .000620673 |
| B | 269,475,845 | 1.0578 | 254,751,224 | 5 | 6 | .002162149 |
| B | 649,315,193 | 1.0954 | 592,765,376 | 4 | 10 | .001049194 |
| F1 | 648,765,581 | 0.9056 | 716,393,089 | 13 | 557 | .036277202 |
| F1 | 673,985,682 | 0.8640 | 780,076,021 | 14 | 166 | .027530007 |
| F1 | 861,590,921 | 0.8527 | 1,010,426,787 | 11 | 68 | .014524514 |
| L1 | 465,282,119 | 1.0527 | 441,989,284 | 12 | 719 | .006910472 |
| L1 | 434,125,595 | 0.9026 | 480,972,297 | 10 | 67 | .072200645 |
| L1 | 488,073,802 | 1.0076 | 484,392,420 | 6 | 14 | .010528149 |
| L1 | 451,241,056 | 0.9038 | 499,270,918 | 3 | 5 | .044536182 |
| Random Totals: | 13,511,507,672 | 14,073,621,985 | 665 | 21,626 | ||
| Catg D1 Exception Values: | 81,568 | 45,876 | ||||
| Catg F1 Exception Values: | 668,384,463 | 802,150,674 | ||||
| Catg L1 Exception Values: | 833,315,504 | 875,660,873 | ||||
| Total Test Values (4): | 15,013,289,207 | 15,751,479,408 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 787,573,970 |
Confidence Interval Values (5)
| State Lower Limit: | 14,963,905,438 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 15,013,289,207 | (Within Confidence Interval) |
| State Upper Limit: | 16,539,053,378 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 13,516,152,601 | (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, D2, E, 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