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2007 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 10,888,450 1.0077 10,805,250 11 1,353 .059973435
G1 87,489,120 1.1679 74,911,482 7 166 .084375616
G1 87,011,612 1.0344 84,117,954 6 49 .012117628
G1 87,503,970 1.0278 85,137,157 5 20 .008992652
G1 83,824,202 0.9608 87,244,174 4 7 .001209241
Random Totals: 356,717,354   342,216,017 33 1,595  
Catg D1 Exception Values: 12,461,750   18,343,219      
Total Test Values (4): 369,179,104   360,559,236      

Margin of Error

Margin of Error Percent: 5.3425288
Margin of Error Value: 19,262,981

Confidence Interval Values (5)

State Lower Limit: 341,296,255 (State Test Value minus Margin of Error Percent)
Local Test Value: 369,179,104 (Within Confidence Interval)
State Upper Limit: 379,822,217 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 405,059,247 (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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