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2006 Confidence Interval Detail
170/Montgomery
170-903/Montgomery ISD

Category Summary

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

Stratum
Variance
A 516,690,715 0.9374 551,195,557 24 5,128 .005076735
A 516,587,319 0.9264 557,628,799 27 2,490 .006476778
A 516,793,182 0.9648 535,647,991 31 1,524 .016174730
A 516,192,928 0.9220 559,862,178 20 783 .009222224
C 50,972,202 0.9000 56,635,780 8 4,967 .003820069
C 48,752,016 0.9664 50,447,036 7 1,309 .004853792
C 47,586,264 0.9964 47,758,193 10 564 .005779063
C 48,857,708 0.9836 49,672,334 9 266 .009540481
Random Totals: 2,262,432,334   2,408,847,868 136 17,031  
Catg D1 Exception Values: 13,640,520   12,507,458      
Total Test Values (4): 2,276,072,854   2,421,355,326      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 121,067,766

Confidence Interval Values (5)

Local Test Value: 2,276,072,854 (Outside Confidence Interval)
State Lower Limit: 2,300,287,560 (State Test Value minus Margin of Error Percent)
State Upper Limit: 2,542,423,092 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,546,081,681 (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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