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2008 Confidence Interval Detail
091/Grayson
091-910/Whitewright ISD

Category Summary

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

Stratum
Variance
A 15,007,624 0.8406 17,853,467 9 354 .069417137
A 14,908,637 0.9538 15,630,779 10 207 .011400288
A 15,492,505 0.9820 15,776,482 8 149 .003375546
A 14,591,638 1.0215 14,284,521 8 80 .002439657
D3 40,741,223 1.0023 40,647,733 15 1,385 .003369880
F1 1,709,277 0.8239 2,074,617 7 41 .027471850
F1 1,469,063 0.7778 1,888,741 5 13 .038343857
F1 1,924,128 0.9230 2,084,646 4 8 .118050315
F1 2,294,565 0.7265 3,158,383 3 5 .078464305
Random Totals: 108,138,660   113,399,369 69 2,242  
Catg J Exception Values: 6,213,077   6,719,832      
Catg D1 Exception Values: 3,509,636   2,601,216      
Total Test Values (4): 117,861,373   122,720,417      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 6,136,021

Confidence Interval Values (5)

State Lower Limit: 116,584,396 (State Test Value minus Margin of Error Percent)
Local Test Value: 117,861,373 (Within Confidence Interval)
State Upper Limit: 128,856,438 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 121,953,571 (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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