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2006 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 1,661,977,374 0.9703 1,712,848,989 65 11,738 .004022272
A 1,662,164,597 0.9612 1,729,259,880 64 8,444 .004630605
A 1,661,824,550 0.9820 1,692,285,692 65 5,678 .008035431
A 1,661,931,144 0.9412 1,765,757,697 65 2,834 .007579650
B 139,773,914 0.9521 146,805,917 6 9 .009468829
B 143,795,502 1.0153 141,628,585 4 6 .009467737
C 125,910,308 0.8881 141,774,922 14 3,090 .057538834
C 126,346,105 0.8806 143,477,294 42 1,019 .027424301
C 125,443,224 0.9489 132,198,571 20 307 .013552898
C 125,860,101 0.9856 127,698,966 6 80 .001713115
F1 185,536,245 0.8511 217,995,823 8 295 .069282436
F1 184,794,491 1.0156 181,955,978 8 102 .003362244
F1 195,217,313 1.0117 192,959,685 6 37 .002301829
Random Totals: 8,000,574,868   8,326,647,999 373 33,639  
Catg D1 Exception Values: 4,590,046   4,350,166      
Catg B Exception Values: 253,830,162   254,798,831      
Catg F1 Exception Values: 184,582,087   178,517,781      
Total Test Values (4): 8,443,577,163   8,764,314,777      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 438,215,739

Confidence Interval Values (5)

State Lower Limit: 8,326,099,038 (State Test Value minus Margin of Error Percent)
Local Test Value: 8,443,577,163 (Within Confidence Interval)
State Upper Limit: 9,202,530,516 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 9,099,811,639 (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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