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2009 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 14,723,811 0.8355 17,622,754 7 347 .023923732
A 15,191,961 0.9133 16,634,141 7 208 .016435627
A 14,962,150 0.9471 15,797,857 7 145 .044409325
A 15,479,391 1.0561 14,657,126 7 89 .012142516
D3 43,214,934 0.9324 46,348,063 12 1,385 .019375799
F1 2,029,953 0.8807 2,304,931 6 44 .042858861
F1 1,739,054 0.9568 1,817,573 5 14 .121986970
F1 1,805,779 0.9307 1,940,237 5 7 .044245844
L1 1,346,873 1.1102 1,213,181 6 45 .036081502
L1 928,891 1.0095 920,150 4 7 .002090187
L1 1,166,520 1.0324 1,129,911 3 6 .000067620
Random Totals: 112,589,317   120,385,924 69 2,297  
Catg J Exception Values: 11,175,310   12,322,500      
Catg D1 Exception Values: 3,110,727   2,465,016      
Catg F1 Exception Values: 2,696,295   3,443,302      
Catg L1 Exception Values: 5,615,830   5,496,020      
Total Test Values (4): 135,187,479   144,112,762      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 7,205,638

Confidence Interval Values (5)

Local Test Value: 135,187,479 (Outside Confidence Interval)
State Lower Limit: 136,907,124 (State Test Value minus Margin of Error Percent)
State Upper Limit: 151,318,400 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 131,283,218 (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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