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2007 Confidence Interval Detail
224/Throckmorton
224-902/Woodson ISD

Category Summary

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

Stratum
Variance
A 743,159 0.9657 769,555 8 49 .038667190
A 764,879 0.8705 878,666 9 29 .010456896
A 752,556 0.8690 866,002 8 19 .039566929
A 707,717 0.9690 730,358 6 12 .079343161
D3 4,686,149 0.7644 6,130,493 28 976 .098360150
G1 4,505,560 0.9904 4,549,233 15 54 .051311023
G1 4,462,030 0.9260 4,818,607 12 19 .008322237
G1 5,458,600 1.0037 5,438,478 7 9 .007207116
Random Totals: 22,080,650   24,181,392 93 1,167  
Catg J Exception Values: 909,722   948,287      
Catg D1 Exception Values: 3,892,460   3,115,322      
Catg G1 Exception Values: 3,491,280   2,845,917      
Total Test Values (4): 30,374,112   31,090,918      

Margin of Error

Margin of Error Percent: 5.0000003
Margin of Error Value: 1,554,546

Confidence Interval Values (5)

State Lower Limit: 29,536,372 (State Test Value minus Margin of Error Percent)
Local Test Value: 30,374,112 (Within Confidence Interval)
State Upper Limit: 32,645,464 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 30,997,028 (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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