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2009 Confidence Interval Detail
252/Young
252-901/Graham ISD

Category Summary

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

Stratum
Variance
A 65,350,710 0.9552 68,415,735 18 1,749 .148808964
A 69,246,500 0.9081 76,254,267 20 979 .022141475
A 69,878,410 1.0064 69,434,032 15 614 .041175640
A 73,197,270 0.9171 79,813,837 15 334 .048846687
D3 54,266,810 0.9413 57,650,919 17 4,763 .059642606
F1 15,870,180 0.9022 17,590,534 7 254 .007590964
F1 15,679,280 0.9566 16,390,633 7 82 .003936977
F1 16,889,660 1.0025 16,847,541 6 20 .054741066
G1 22,130,380 0.9711 22,788,982 7 255 .139904253
G1 22,105,420 1.0019 22,063,499 8 91 .026051947
G1 23,408,970 1.0001 23,406,629 6 34 .006347911
G1 20,385,370 1.0200 19,985,657 2 5 .004092484
L1 9,095,020 1.0539 8,629,870 7 179 .043312686
L1 9,563,160 0.9688 9,871,140 9 48 .003934613
L1 10,328,100 1.0098 10,227,867 5 21 .007480644
Random Totals: 497,395,240   519,371,142 149 9,428  
Catg J Exception Values: 27,512,883   27,203,957      
Catg D1 Exception Values: 25,079,770   19,892,516      
Catg F1 Exception Values: 14,946,020   14,717,445      
Catg G1 Exception Values: 28,548,320   28,853,730      
Catg L1 Exception Values: 9,960,610   9,747,553      
Total Test Values (4): 603,442,843   619,786,343      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 30,989,317

Confidence Interval Values (5)

State Lower Limit: 588,797,026 (State Test Value minus Margin of Error Percent)
Local Test Value: 603,442,843 (Within Confidence Interval)
State Upper Limit: 650,775,660 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 620,576,429 (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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