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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 0.8733 16,859,969 7 347 .023378131
A 15,191,961 0.9133 16,634,141 7 208 .016435627
A 14,962,150 0.9527 15,704,996 7 145 .047706250
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 1.0397 1,952,441 6 44 .005348202
F1 1,739,054 1.0207 1,703,786 5 14 .069744806
F1 1,805,779 0.9892 1,825,494 5 7 .057628727
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   118,949,258 69 2,297  
Catg J Exception Values: 11,175,310   11,281,118      
Catg D1 Exception Values: 3,110,727   2,465,016      
Catg F1 Exception Values: 2,696,295   3,171,483      
Catg L1 Exception Values: 5,615,830   5,496,020      
Total Test Values (4): 135,187,479   141,362,895      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 7,068,145

Confidence Interval Values (5)

State Lower Limit: 134,294,750 (State Test Value minus Margin of Error Percent)
Local Test Value: 135,187,479 (Within Confidence Interval)
State Upper Limit: 148,431,040 (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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