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2007 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 2,013,915,679 0.9721 2,071,716,571 25 12,939 .004590451
A 2,014,072,531 1.0136 1,987,048,669 24 9,061 .004773484
A 2,013,950,720 1.0056 2,002,735,402 25 5,910 .002948618
A 2,013,704,129 0.9617 2,093,900,519 25 2,952 .007379463
B 160,393,241 0.9912 161,817,233 7 133 .000077405
B 176,224,831 1.0145 173,706,093 3 7 .003004196
B 180,695,226 0.9279 194,735,668 2 5 .006972482
C 149,049,713 0.8494 175,476,469 7 2,979 .043079396
C 124,450,765 0.9755 127,576,386 8 926 .027035962
C 136,578,293 0.9751 140,065,935 9 318 .037380978
C 136,579,211 0.9954 137,210,379 8 81 .000191058
F1 238,753,825 0.9291 256,973,227 8 322 .006988005
F1 238,843,359 1.0111 236,221,303 8 112 .003297223
F1 242,782,829 1.0099 240,402,841 6 40 .011464925
F1 230,270,265 1.0102 227,945,224 6 14 .004504032
Random Totals: 10,070,264,617   10,227,531,919 171 35,799  
Catg D1 Exception Values: 4,352,151   3,883,921      
Catg B Exception Values: 153,304,638   154,450,481      
Total Test Values (4): 10,227,921,406   10,385,866,321      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 519,293,316

Confidence Interval Values (5)

State Lower Limit: 9,866,573,005 (State Test Value minus Margin of Error Percent)
Local Test Value: 10,227,921,406 (Within Confidence Interval)
State Upper Limit: 10,905,159,637 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 11,049,255,518 (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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