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2011 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 800,409,028 1.0454 765,648,582 33 6,062 .016559276
A 744,168,138 1.0104 736,508,450 42 3,056 .011196137
A 809,532,573 1.0117 800,170,577 28 2,079 .012562555
A 900,998,093 1.0046 896,872,480 41 1,171 .014910670
C 53,682,190 1.1661 46,035,666 41 3,920 .039755991
C 52,760,245 1.0906 48,377,265 31 895 .060801247
C 55,031,680 0.9792 56,200,654 25 420 .018041216
C 47,826,360 1.0370 46,119,923 10 142 .006691098
Random Totals: 3,464,408,307   3,395,933,597 251 17,745  
Catg D1 Exception Values: 12,467,373   11,181,119      
Total Test Values (4): 3,476,875,680   3,407,114,716      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 170,355,736

Confidence Interval Values (5)

State Lower Limit: 3,236,758,980 (State Test Value minus Margin of Error Percent)
Local Test Value: 3,476,875,680 (Within Confidence Interval)
State Upper Limit: 3,577,470,452 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,708,208,218 (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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