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2008 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 30,174,011 0.8870 34,018,051 8 567 .043945666
A 33,573,769 0.9009 37,266,921 11 287 .025602060
A 33,729,326 0.9761 34,555,195 9 185 .002769716
A 35,157,785 1.0367 33,913,172 8 91 .005331109
D3 59,939,326 0.9475 63,260,502 25 2,709 .024713147
G1 20,426,867 0.9766 20,916,309 9 39 .018572826
G1 21,465,707 1.0716 20,031,455 5 10 .010329274
G1 38,749,499 0.9888 39,188,409 3 4 .008988640
Random Totals: 273,216,290   283,150,014 78 3,892  
Catg J Exception Values: 10,151,552   10,456,372      
Catg D1 Exception Values: 8,479,390   6,013,600      
Catg G1 Exception Values: 27,972,200   26,125,196      
Total Test Values (4): 319,819,432   325,745,182      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 16,287,259

Confidence Interval Values (5)

State Lower Limit: 309,457,923 (State Test Value minus Margin of Error Percent)
Local Test Value: 319,819,432 (Within Confidence Interval)
State Upper Limit: 342,032,441 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 349,296,670 (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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