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2011 Confidence Interval Detail
061/Denton
057-903/Carrollton-Farmers Branch ISD

Category Summary

(1)
Category
(1)
Local
Value
(1)
Stratum
Ratio
(1)
State
Value
(2)
Sample
Size
(3)
Total
Parcels

Stratum
Variance
A 429,597,403 0.9880 434,815,185 49 3,326 .005399141
A 444,842,432 1.0249 434,034,961 56 2,918 .005526482
A 453,049,474 1.0016 452,325,753 68 2,449 .005861396
A 434,981,866 0.9952 437,079,849 41 1,722 .005648410
B 115,981,704 0.8374 138,502,154 8 17 .006853689
B 187,537,988 0.8492 220,840,777 7 20 .020263659
B 183,545,524 0.7669 239,334,364 6 14 .036575593
B 20,114,921 0.7837 25,666,608 4 1 .016400604
F1 63,940,165 0.9481 67,440,317 11 82 .017702803
F1 75,714,345 0.9851 76,859,552 10 40 .010801745
F1 68,287,932 0.9218 74,081,072 9 20 .015690033
F1 72,819,464 0.9401 77,459,275 5 9 .006367890
Random Totals: 2,550,413,218   2,678,439,867 274 10,618  
Total Test Values (4): 2,550,413,218   2,678,439,867      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 133,921,993

Confidence Interval Values (5)

State Lower Limit: 2,544,517,874 (State Test Value minus Margin of Error Percent)
Local Test Value: 2,550,413,218 (Within Confidence Interval)
State Upper Limit: 2,812,361,860 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,709,868,850 (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

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