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2010 Confidence Interval Detail
091/Grayson
091-910/Whitewright ISD

Category Summary

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

Stratum
Variance
A 16,474,558 0.9901 16,639,287 14 378 .005356063
A 13,855,827 0.9062 15,290,032 14 187 .031900039
A 15,480,393 0.9325 16,600,958 14 148 .013716296
A 15,318,028 0.9209 16,633,758 13 81 .011945512
D3 46,395,569 1.0276 45,149,444 20 1,387 .013359498
F1 2,133,551 0.9059 2,355,173 8 42 .166249734
F1 2,658,399 1.0064 2,641,493 7 18 .008882995
F1 1,793,379 1.0188 1,760,286 5 6 .008956567
L1 1,528,240 1.1601 1,317,335 6 39 .034259598
L1 2,164,371 1.0294 2,102,556 4 8 .000387451
Random Totals: 117,802,315   120,490,322 105 2,294  
Catg J Exception Values: 10,735,004   11,918,160      
Catg D1 Exception Values: 3,055,666   2,348,734      
Catg F1 Exception Values: 2,131,894   2,328,791      
Catg L1 Exception Values: 5,824,705   3,458,946      
Total Test Values (4): 139,549,584   140,544,953      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 7,027,248

Confidence Interval Values (5)

State Lower Limit: 133,517,705 (State Test Value minus Margin of Error Percent)
Local Test Value: 139,549,584 (Within Confidence Interval)
State Upper Limit: 147,572,201 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 133,314,273 (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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