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2010 Confidence Interval Detail
091/Grayson
091-914/Sadler-Southmayd ISD

Category Summary

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

Stratum
Variance
A 35,037,810 0.9436 37,132,058 12 602 .043508676
A 37,887,438 0.9177 41,285,211 12 294 .021611427
A 34,787,199 0.9562 36,380,672 10 179 .045866247
A 36,280,608 1.0651 34,063,100 11 92 .008733272
D3 64,510,461 1.1696 55,156,003 20 2,802 .092958221
G1 22,844,047 0.9282 24,611,126 8 43 .035977858
G1 22,510,388 0.9825 22,911,336 5 11 .001950214
G1 27,400,262 0.9992 27,422,200 2 3 .000139429
Random Totals: 281,258,213   278,961,706 80 4,026  
Catg J Exception Values: 8,982,636   8,676,706      
Catg D1 Exception Values: 7,256,342   5,365,077      
Catg G1 Exception Values: 16,117,461   15,984,189      
Total Test Values (4): 313,614,652   308,987,678      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 15,449,384

Confidence Interval Values (5)

State Lower Limit: 293,538,294 (State Test Value minus Margin of Error Percent)
Local Test Value: 313,614,652 (Within Confidence Interval)
State Upper Limit: 324,437,062 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 339,352,593 (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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