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2007 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 2,628,005,126 0.9669 2,717,969,931 40 19,865 .002825025
A 2,627,924,768 0.9873 2,661,728,723 58 14,145 .003398939
A 2,627,885,808 0.9666 2,718,690,056 60 10,387 .014798445
A 2,627,871,641 0.9422 2,789,080,494 57 6,274 .005566167
B 130,355,559 0.9167 142,200,893 5 19 .019277815
B 126,572,989 0.9132 138,603,799 5 10 .011353899
B 139,222,955 0.9870 141,056,692 4 8 .010252407
B 108,632,110 0.9902 109,707,241 3 4 .012690793
C 80,734,017 0.9440 85,523,323 7 2,367 .010416755
C 80,939,829 0.9481 85,370,561 8 454 .018995852
C 81,368,491 1.0079 80,730,718 7 110 .010688175
C 79,803,517 0.9818 81,282,865 6 33 .065878309
D3 287,646,808 0.7689 374,101,714 10 1,757 .154019511
F1 711,364,114 0.9295 765,319,111 7 581 .085091630
F1 713,111,264 0.8304 858,756,339 7 155 .115903956
F1 731,061,517 1.1463 637,757,583 6 54 .031150224
F1 682,793,035 0.9254 737,835,568 4 9 .035903575
L1 251,679,315 1.0263 245,229,772 9 1,908 .006683849
L1 253,851,962 0.9597 264,511,787 7 231 .059959770
L1 254,203,283 0.9352 271,817,026 6 46 .004533440
Random Totals: 15,225,028,108   15,907,274,196 316 58,417  
Catg D1 Exception Values: 6,880,103   6,041,614      
Catg L1 Exception Values: 199,321,495   238,806,957      
Total Test Values (4): 15,431,229,706   16,152,122,767      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 807,606,138

Confidence Interval Values (5)

State Lower Limit: 15,344,516,629 (State Test Value minus Margin of Error Percent)
Local Test Value: 15,431,229,706 (Within Confidence Interval)
State Upper Limit: 16,959,728,905 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 15,654,942,784 (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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