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2007 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 611,120,346 0.9750 626,790,098 28 5,184 .004736931
A 610,915,689 0.9850 620,218,974 29 2,652 .006611719
A 611,106,730 0.9643 633,730,924 28 1,643 .005522548
A 610,713,573 0.9730 627,660,404 28 861 .011592450
C 57,963,994 0.9922 58,419,667 20 4,775 .019693817
C 57,924,832 0.9647 60,044,399 16 1,175 .009930261
C 57,684,085 0.9732 59,272,590 17 502 .009934626
C 57,794,338 0.9648 59,902,921 12 196 .002078834
Random Totals: 2,675,223,587   2,746,039,977 178 16,988  
Catg D1 Exception Values: 13,779,352   12,496,796      
Total Test Values (4): 2,689,002,939   2,758,536,773      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 137,926,839

Confidence Interval Values (5)

State Lower Limit: 2,620,609,934 (State Test Value minus Margin of Error Percent)
Local Test Value: 2,689,002,939 (Within Confidence Interval)
State Upper Limit: 2,896,463,612 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,847,396,257 (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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