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2009 Confidence Interval Detail
220/Tarrant
220-908/Mansfield ISD

Category Summary

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

Stratum
Variance
A 1,562,258,952 0.9804 1,593,491,383 24 12,513 .003916700
A 1,518,728,463 0.9750 1,557,670,218 23 9,294 .006646528
A 1,460,061,380 1.0018 1,457,437,992 26 7,006 .007363772
A 1,578,032,894 0.9861 1,600,276,741 23 4,692 .003570935
F1 243,328,999 0.9390 259,136,314 8 430 .008820977
F1 259,866,497 0.8755 296,820,670 9 161 .003431570
F1 228,727,491 0.9379 243,871,938 7 60 .020329495
F1 236,238,104 0.9259 255,144,296 5 20 .006844746
L1 106,746,600 1.0936 97,610,278 7 597 .018070069
L1 103,391,996 1.0360 99,799,224 6 90 .001131754
L1 107,055,447 1.0440 102,543,532 5 26 .001305917
Random Totals: 7,404,436,823   7,563,802,586 143 34,889  
Catg D1 Exception Values: 862,820   897,145      
Catg L1 Exception Values: 106,950,580   104,989,044      
Total Test Values (4): 7,512,250,223   7,669,688,775      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 383,484,439

Confidence Interval Values (5)

State Lower Limit: 7,286,204,336 (State Test Value minus Margin of Error Percent)
Local Test Value: 7,512,250,223 (Within Confidence Interval)
State Upper Limit: 8,053,173,214 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 8,672,577,657 (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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