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2006 Confidence Interval Detail
237/Waller
101-914/Katy ISD

Category Summary

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

Stratum
Variance
A 2,257,782,442 0.9534 2,368,137,657 31 19,033 .011801955
A 2,253,331,283 0.9747 2,311,820,338 41 13,569 .007683602
A 2,255,692,744 1.0053 2,243,800,601 43 9,977 .005966490
A 2,255,106,130 1.0071 2,239,207,755 21 6,133 .013770563
B 126,404,289 0.9122 138,570,806 7 18 .006575185
B 118,102,049 0.9345 126,379,935 4 10 .001807492
B 135,904,941 0.9737 139,575,784 4 8 .000445948
B 99,929,272 0.9935 100,583,062 3 4 .002050916
C 73,474,363 0.9002 81,620,043 10 3,039 .036261287
C 70,440,955 0.8861 79,495,491 11 413 .052273701
C 72,881,641 1.0807 67,439,290 9 103 .140585385
C 70,838,109 1.1559 61,283,942 10 31 .034808872
F1 585,805,804 0.9705 603,612,369 10 554 .049780652
F1 589,627,602 0.9025 653,326,983 11 143 .069439488
F1 1,164,795,216 0.9375 1,242,448,230 7 48 .003094334
L1 224,806,346 1.1990 187,494,867 8 1,650 .026562391
L1 225,225,539 0.9502 237,029,614 8 204 .010350189
L1 230,317,721 0.7976 288,763,442 6 46 .087180790
L1 217,579,388 0.8161 266,608,734 4 11 .021722579
Random Totals: 13,028,045,834   13,437,198,943 248 54,994  
Catg D1 Exception Values: 7,724,538   8,523,384      
Total Test Values (4): 13,035,770,372   13,445,722,327      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 672,286,116

Confidence Interval Values (5)

State Lower Limit: 12,773,436,211 (State Test Value minus Margin of Error Percent)
Local Test Value: 13,035,770,372 (Within Confidence Interval)
State Upper Limit: 14,118,008,443 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 13,692,852,270 (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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