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2006 Confidence Interval Detail
156/Martin
156-905/Grady ISD

Category Summary

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

Stratum
Variance
D3 9,857,980 0.8411 11,720,342 21 1,341 .373759420
G1 71,499,440 1.0098 70,805,546 7 165 .002231505
G1 71,657,740 1.1154 64,243,984 6 51 .011226179
G1 72,398,530 1.0136 71,427,121 5 18 .001152485
G1 70,122,264 1.0351 67,744,434 3 6 .003310087
Random Totals: 295,535,954   285,941,427 42 1,581  
Catg D1 Exception Values: 8,305,260   13,161,498      
Total Test Values (4): 303,841,214   299,102,925      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 14,955,146

Confidence Interval Values (5)

State Lower Limit: 284,147,779 (State Test Value minus Margin of Error Percent)
Local Test Value: 303,841,214 (Within Confidence Interval)
State Upper Limit: 314,058,071 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 331,696,305 (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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