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2007 Confidence Interval Detail
091/Grayson
091-907/Tioga ISD

Category Summary

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

Stratum
Variance
A 8,489,030 0.9486 8,949,009 10 134 .009155842
A 8,449,325 0.9150 9,234,235 7 87 .051410728
A 8,435,735 1.0215 8,258,184 7 65 .014906771
A 8,317,726 0.9933 8,373,831 8 37 .010982283
D3 22,739,913 0.9429 24,116,993 21 724 .102675397
F1 4,730,109 0.8818 5,364,152 12 35 .439608099
Random Totals: 61,161,838   64,296,404 65 1,082  
Catg D1 Exception Values: 2,413,099   1,854,979      
Total Test Values (4): 63,574,937   66,151,383      

Margin of Error

Margin of Error Percent: 6.2712234
Margin of Error Value: 4,148,501

Confidence Interval Values (5)

State Lower Limit: 62,002,882 (State Test Value minus Margin of Error Percent)
Local Test Value: 63,574,937 (Within Confidence Interval)
State Upper Limit: 70,299,884 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 64,843,250 (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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