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2009 Confidence Interval Detail
246/Williamson
246-913/Leander ISD

Category Summary

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

Stratum
Variance
A 1,372,463,605 0.9808 1,399,330,756 57 9,792 .003264469
A 1,355,621,140 0.9695 1,398,268,324 57 7,715 .004470268
A 1,298,765,388 0.9821 1,322,437,010 57 5,853 .004488244
A 1,180,388,131 0.9805 1,203,863,469 57 3,414 .007153746
B 99,156,959 0.9136 108,534,325 7 280 .005030901
B 100,469,755 1.0386 96,735,755 4 4 .004277869
C 37,848,782 0.8330 45,436,713 7 483 .041839188
C 67,696,429 0.7692 88,008,878 9 238 .184419670
C 66,249,023 1.0370 63,885,268 7 85 .022865636
C 54,227,071 1.0033 54,048,710 8 25 .003941401
F1 227,093,988 1.0568 214,888,331 7 317 .047081887
F1 244,374,148 0.8959 272,769,447 7 124 .021494467
F1 253,384,311 1.0324 245,432,304 6 44 .004754315
F1 217,533,219 0.9443 230,364,523 3 7 .002466837
L1 77,413,537 1.0215 75,784,177 8 496 .025887470
L1 88,228,791 0.9514 92,735,748 6 70 .025776940
L1 68,294,480 0.9194 74,281,575 4 10 .002672839
L1 90,392,722 0.9385 96,316,166 2 4 .004418185
Random Totals: 6,899,601,479   7,083,121,479 313 28,961  
Catg D1 Exception Values: 1,316,327   1,029,660      
Catg B Exception Values: 94,517,256   97,399,172      
Total Test Values (4): 6,995,435,062   7,181,550,311      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 359,077,516

Confidence Interval Values (5)

State Lower Limit: 6,822,472,795 (State Test Value minus Margin of Error Percent)
Local Test Value: 6,995,435,062 (Within Confidence Interval)
State Upper Limit: 7,540,627,827 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,319,339,357 (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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