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2010 Confidence Interval Detail
091/Grayson
091-901/Bells ISD

Category Summary

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

Stratum
Variance
A 18,123,563 0.9721 18,643,723 12 350 .018720946
A 18,261,988 0.9583 19,056,650 11 193 .017112480
A 18,889,895 1.0239 18,448,965 11 136 .000622271
A 18,743,088 0.9648 19,426,915 11 91 .012342826
D3 49,639,736 0.9455 52,501,043 20 1,652 .073638627
Random Totals: 123,658,270   128,077,296 65 2,422  
Catg J Exception Values: 5,251,189   5,170,406      
Catg D1 Exception Values: 2,953,471   2,060,854      
Total Test Values (4): 131,862,930   135,308,556      

Margin of Error

Margin of Error Percent: 5.0064410
Margin of Error Value: 6,774,143

Confidence Interval Values (5)

State Lower Limit: 128,534,413 (State Test Value minus Margin of Error Percent)
Local Test Value: 131,862,930 (Within Confidence Interval)
State Upper Limit: 142,082,699 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 195,896,115 (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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