2009 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 | 1,237,702,948 | 0.9910 | 1,248,943,439 | 22 | 6,999 | .002122681 |
| A | 1,344,756,678 | 0.9811 | 1,370,662,193 | 23 | 5,072 | .003125127 |
| A | 1,374,457,949 | 0.9807 | 1,401,507,035 | 29 | 3,622 | .003143965 |
| A | 1,356,865,199 | 0.9938 | 1,365,330,247 | 26 | 1,890 | .006857870 |
| B | 154,519,266 | 1.0040 | 153,903,651 | 11 | 718 | .001757691 |
| B | 182,082,806 | 0.9580 | 190,065,559 | 5 | 16 | .001172246 |
| B | 191,419,969 | 0.8915 | 214,716,735 | 4 | 8 | .004716202 |
| B | 103,642,240 | 0.9372 | 110,587,111 | 2 | 3 | .000042439 |
| F1 | 625,662,856 | 0.9008 | 694,563,561 | 15 | 532 | .016159904 |
| F1 | 676,434,823 | 0.9252 | 731,122,809 | 14 | 163 | .013879328 |
| F1 | 589,193,895 | 0.8781 | 670,987,239 | 12 | 46 | .022999834 |
| L1 | 543,224,582 | 1.0450 | 519,832,136 | 8 | 640 | .011009741 |
| L1 | 419,788,714 | 1.0316 | 406,929,734 | 6 | 28 | .006709170 |
| L1 | 1,095,263,490 | 0.9988 | 1,096,579,385 | 6 | 10 | .000012809 |
| Random Totals: | 9,895,015,415 | 10,175,730,834 | 183 | 19,747 | ||
| Catg D1 Exception Values: | 89,325 | 78,603 | ||||
| Catg F1 Exception Values: | 573,952,228 | 606,630,300 | ||||
| Total Test Values (4): | 10,469,056,968 | 10,782,439,737 |
Margin of Error
| Margin of Error Percent: | 5.0000000 |
|---|---|
| Margin of Error Value: | 539,121,987 |
Confidence Interval Values (5)
| State Lower Limit: | 10,243,317,750 | (State Test Value minus Margin of Error Percent) |
|---|---|---|
| Local Test Value: | 10,469,056,968 | (Within Confidence Interval) |
| State Upper Limit: | 11,321,561,724 | (State Test Value plus Margin of Error Percent) |
| Value Assigned (6): | 10,033,282,232 | (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