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2008 Confidence Interval Detail
242/Wheeler
242-902/Shamrock ISD

Category Summary

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

Stratum
Variance
A 6,091,520 0.9922 6,139,407 12 380 .067323468
A 6,846,250 0.9741 7,028,283 7 169 .048303608
A 8,984,060 0.9543 9,414,293 7 150 .025798735
A 9,996,910 0.9780 10,221,789 6 97 .017361208
D3 12,646,710 0.9624 13,140,804 20 1,396 .038754908
F1 4,110,040 0.8345 4,925,153 6 103 .021737171
F1 3,584,360 0.6935 5,168,508 5 17 .340891669
G1 15,609,350 1.0725 14,554,172 15 167 .036876043
G1 15,534,490 1.0339 15,025,138 14 54 .005458956
G1 16,709,170 1.0372 16,109,882 8 14 .011411730
L1 2,239,060 0.8574 2,611,453 6 90 .112069311
L1 2,009,650 1.0684 1,880,990 5 19 .017630923
L1 1,839,110 0.9738 1,888,591 4 9 .002592084
L1 3,706,300 0.9210 4,024,213 3 9 .047695242
Random Totals: 109,906,980   112,132,676 118 2,674  
Catg J Exception Values: 6,943,933   6,548,228      
Catg D1 Exception Values: 10,731,730   9,536,013      
Catg F1 Exception Values: 7,951,800   10,337,203      
Catg G1 Exception Values: 14,298,180   14,549,454      
Total Test Values (4): 149,832,623   153,103,574      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 7,655,179

Confidence Interval Values (5)

State Lower Limit: 145,448,395 (State Test Value minus Margin of Error Percent)
Local Test Value: 149,832,623 (Within Confidence Interval)
State Upper Limit: 160,758,753 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 154,742,031 (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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