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2007 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 7,140,497 0.8474 8,426,359 14 453 .137341505
A 7,143,607 0.9887 7,225,252 14 175 .071142914
A 7,154,706 0.9290 7,701,513 14 113 .021295632
A 5,732,489 0.9673 5,926,278 12 56 .004974583
D3 11,434,844 0.9282 12,319,375 20 1,457 .234120586
F1 16,814,600 0.9381 17,924,102 20 224 .032343323
G1 14,255,004 1.2964 10,995,838 15 205 .130862639
G1 14,363,280 1.2411 11,573,024 15 78 .040449249
G1 14,262,323 1.1371 12,542,717 15 24 .036286323
Random Totals: 98,301,350   94,634,458 139 2,785  
Catg J Exception Values: 4,301,333   4,398,437      
Catg D1 Exception Values: 11,540,360   12,996,667      
Catg G1 Exception Values: 14,001,574   14,874,374      
Total Test Values (4): 128,144,617   126,903,936      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 6,345,197

Confidence Interval Values (5)

State Lower Limit: 120,558,739 (State Test Value minus Margin of Error Percent)
Local Test Value: 128,144,617 (Within Confidence Interval)
State Upper Limit: 133,249,133 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 137,960,346 (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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