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2009 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 12,177,980 1.0545 11,548,582 11 1,400 .008491904
G1 140,844,659 1.0249 137,422,831 15 189 .018542409
G1 140,735,311 1.0608 132,669,034 15 68 .009528599
G1 144,433,819 0.9961 144,999,316 15 36 .001246163
G1 134,722,325 1.0280 131,052,845 9 13 .003826748
Random Totals: 572,914,094   557,692,608 65 1,706  
Catg D1 Exception Values: 27,648,120   32,587,055      
Total Test Values (4): 600,562,214   590,279,663      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 29,513,983

Confidence Interval Values (5)

State Lower Limit: 560,765,680 (State Test Value minus Margin of Error Percent)
Local Test Value: 600,562,214 (Within Confidence Interval)
State Upper Limit: 619,793,646 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 678,539,046 (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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