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2008 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 1,961,039,282 1.0024 1,956,344,056 25 13,531 .005879180
A 2,028,241,909 0.9937 2,041,100,844 25 9,814 .005572625
A 1,031,054,050 1.0003 1,030,744,827 25 3,310 .003482853
A 242,615,214 0.9870 245,810,754 32 415 .006552049
B 104,468,374 1.0536 99,153,734 8 152 .000297514
B 171,723,353 0.8995 190,909,787 5 7 .011795984
C 63,493,374 0.9479 66,983,199 7 1,572 .065860924
C 50,023,313 0.9703 51,554,481 7 294 .015805993
C 86,412,446 1.0339 83,579,114 7 169 .134646919
C 96,050,970 0.9812 97,891,327 7 59 .000921118
F1 191,938,510 1.0095 190,132,254 8 291 .031599314
F1 253,934,024 0.8288 306,387,577 7 130 .106641031
F1 400,556,229 1.0099 396,629,596 9 41 .009112035
L1 62,329,484 0.9466 65,845,641 7 496 .015856087
L1 66,371,332 0.9861 67,306,898 7 91 .003300233
L1 41,408,705 0.8952 46,256,373 5 12 .010616147
L1 131,325,856 1.0067 130,451,829 3 9 .005694906
Random Totals: 6,982,986,425   7,067,082,291 194 30,393  
Catg D1 Exception Values: 1,281,275   973,921      
Total Test Values (4): 6,984,267,700   7,068,056,212      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 353,402,811

Confidence Interval Values (5)

State Lower Limit: 6,714,653,401 (State Test Value minus Margin of Error Percent)
Local Test Value: 6,984,267,700 (Within Confidence Interval)
State Upper Limit: 7,421,459,023 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,223,252,855 (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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