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2010 Confidence Interval Detail
091/Grayson
091-913/Pottsboro ISD

Category Summary

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

Stratum
Variance
A 105,789,297 0.9520 111,123,211 30 1,583 .015316447
A 112,568,074 1.0095 111,508,741 22 848 .001212162
A 116,954,313 0.9743 120,039,324 16 566 .015429438
A 112,667,278 1.0032 112,307,893 10 284 .000391877
D3 75,014,739 1.0238 73,270,892 20 1,709 .009930687
F1 15,463,669 0.9839 15,716,708 9 106 .115379604
F1 15,100,759 0.8070 18,712,217 7 24 .077363852
F1 11,321,343 1.0613 10,667,430 3 5 .002939965
G1 14,671,627 1.0890 13,472,568 7 29 .019397974
G1 14,701,057 1.0953 13,421,946 7 14 .008791716
G1 15,524,006 1.0340 15,013,545 4 8 .001197476
Random Totals: 609,776,162   615,254,475 135 5,176  
Catg J Exception Values: 13,767,917   14,872,558      
Catg D1 Exception Values: 2,979,624   2,128,397      
Catg F1 Exception Values: 7,847,141   7,687,236      
Catg G1 Exception Values: 12,079,339   12,058,770      
Total Test Values (4): 646,450,183   652,001,436      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 32,600,072

Confidence Interval Values (5)

State Lower Limit: 619,401,364 (State Test Value minus Margin of Error Percent)
Local Test Value: 646,450,183 (Within Confidence Interval)
State Upper Limit: 684,601,508 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 658,012,798 (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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