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2009 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 715,158,956 0.9410 759,998,891 37 5,756 .012229424
A 759,880,838 0.9745 779,764,841 27 3,251 .006047235
A 764,779,331 0.9832 777,847,163 23 2,052 .004763446
A 853,110,760 0.9769 873,283,611 20 1,163 .005127320
C 57,460,820 0.9836 58,418,890 10 4,103 .036855857
C 52,575,365 1.0436 50,378,847 7 895 .029310795
C 55,300,230 0.9580 57,724,666 8 404 .011749594
C 55,687,720 1.0131 54,967,644 7 154 .048414699
Random Totals: 3,313,954,020   3,412,384,553 139 17,778  
Catg D1 Exception Values: 13,248,877   12,036,516      
Total Test Values (4): 3,327,202,897   3,424,421,069      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 171,221,053

Confidence Interval Values (5)

State Lower Limit: 3,253,200,016 (State Test Value minus Margin of Error Percent)
Local Test Value: 3,327,202,897 (Within Confidence Interval)
State Upper Limit: 3,595,642,122 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,470,309,968 (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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